{"product_id":"rolton-k400-voice-amplifier-headset-microphone-kit-1","title":"Rolton K400 Voice Amplifier \u0026 Headset Microphone Kit","description":"\n\u003ch2\u003eRolton K400 Portable Voice Amplifier \u0026amp; Headset Microphone Kit\u003c\/h2\u003e\n\u003cp\u003eWhether you're leading a classroom, guiding a tour group, running a promotion, or presenting at a meeting, the \u003cstrong\u003eRolton K400 Voice Amplifier Kit\u003c\/strong\u003e keeps your voice clear, confident, and effortlessly heard — without straining. This compact, wearable speaker system includes a professional wired headset condenser microphone, delivering crisp omnidirectional audio pickup and powerful output in a surprisingly small package. Made in Mainland China.\u003c\/p\u003e\n\n\u003ch3\u003eWhy Choose the Rolton K400?\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePowerful 5W+ Audio Output\u003c\/strong\u003e — Projects your voice clearly to groups of 20–50 people, indoors or outdoors.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWearable \u0026amp; Lightweight Design\u003c\/strong\u003e — Compact unit (H 8.5cm × W 8.5cm × D 3.4cm \/ approx. 3.3\" × 3.3\" × 1.2\") clips easily to a belt or waistband for hands-free comfort.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eLong-Lasting 1200mAh Detachable Battery\u003c\/strong\u003e — Up to 8 hours of continuous use; replaceable 18650 cell so you're never stuck mid-session.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eUSB Charging Convenience\u003c\/strong\u003e — Charges via any standard USB 5V charger (including your phone charger); charger current should be 500mA or greater.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eUSB \u0026amp; TF Card Music Playback\u003c\/strong\u003e — Plug in a USB drive or TF\/microSD card to play background music between sessions or during events.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOmnidirectional Condenser Headset Mic\u003c\/strong\u003e — Picks up your voice naturally from all angles for smooth, consistent audio without repositioning.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eEasy Knob Volume Control\u003c\/strong\u003e — Simple rotary dial lets you adjust volume on the fly, even mid-presentation.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWired Reliability\u003c\/strong\u003e — Zero latency, no pairing, no battery drain on the mic — just plug in and speak.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat's in the Box?\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e1 × Rolton K400 Loudspeaker\u003c\/li\u003e\n  \u003cli\u003e1 × 1200mAh Rechargeable 18650 Battery\u003c\/li\u003e\n  \u003cli\u003e1 × Professional Wired Headset Condenser Microphone\u003c\/li\u003e\n  \u003cli\u003e1 × USB Charging Cable\u003c\/li\u003e\n  \u003cli\u003e1 × Waistband Belt Clip\u003c\/li\u003e\n  \u003cli\u003e1 × Instruction Manual\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e AyeBeau \/ Rolton K400\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eAudio Output:\u003c\/strong\u003e \u0026gt;5W\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBattery Capacity:\u003c\/strong\u003e 1200mAh (detachable)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePlayback Time:\u003c\/strong\u003e ~4–8 hours (at 50–80% volume)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCharging Input:\u003c\/strong\u003e Standard USB 5V\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMicrophone Type:\u003c\/strong\u003e Condenser, Omnidirectional Polar Pattern\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eConnection:\u003c\/strong\u003e Wired\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMedia Support:\u003c\/strong\u003e USB Disk, TF Card\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDimensions:\u003c\/strong\u003e H 8.5cm × W 8.5cm × D 3.4cm\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCountry of Origin:\u003c\/strong\u003e Made in Mainland China\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003ePerfect For\u003c\/h3\u003e\n\u003cp\u003eTeachers, lecturers, tour guides, fitness instructors, event hosts, sales promoters, coaches, and anyone who needs to address a group without raising their voice.\u003c\/p\u003e\n\n\u003ch3\u003eExplore More Audio \u0026amp; Electronics\u003c\/h3\u003e\n\u003cp\u003eLooking for more tech essentials? Check out the \u003ca href=\"\/products\/1-32-inch-amoled-smart-watch-bluetooth-call-fitness-tracker-ios-android\"\u003e1.32\" AMOLED Smart Watch – Bluetooth Call \u0026amp; Fitness Tracker\u003c\/a\u003e and the \u003ca href=\"\/products\/gadgets-audio\"\u003eGadgets \u0026amp; Audio Collection\u003c\/a\u003e. You might also like our \u003ca href=\"\/products\/1-44-inch-touch-smartwatch-bluetooth-call-fitness-tracker\"\u003e1.44\" Touch Smartwatch – Bluetooth Calls \u0026amp; Fitness Tracker\u003c\/a\u003e.\u003c\/p\u003e\n\n\u003cp\u003eFor guidance on safe use of portable audio equipment and hearing protection, see the \u003ca href=\"https:\/\/www.cdc.gov\/niosh\/topics\/noise\/default.html\" target=\"_blank\" rel=\"noopener noreferrer\"\u003eCDC's Noise and Hearing Loss Prevention resource\u003c\/a\u003e.\u003c\/p\u003e\n\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003ch4\u003eQ: Can the Rolton K400 voice amplifier be used outdoors for tour guiding?\u003c\/h4\u003e\n\u003cp\u003eA: Yes! The Rolton K400 is specifically designed for both indoor and outdoor use. Its 5W+ audio output is strong enough to address groups of up to 50 people in open spaces, making it ideal for tour guides, outdoor fitness classes, and promotions.\u003c\/p\u003e\n\u003ch4\u003eQ: How long does the battery last on the Rolton K400 headset microphone kit?\u003c\/h4\u003e\n\u003cp\u003eA: The included 1200mAh detachable 18650 battery provides up to 8 hours of use, or approximately 4–8 hours of music playback at 50–80% volume. The battery is also detachable, so you can carry a spare for all-day events.\u003c\/p\u003e\n\u003ch4\u003eQ: Does the Rolton K400 support Bluetooth or is it wired only?\u003c\/h4\u003e\n\u003cp\u003eA: The Rolton K400 uses a wired headset condenser microphone for zero-latency, reliable audio transmission. It does support USB disk and TF card playback for music, but the microphone connection is wired — ensuring consistent, interference-free performance in any environment.\u003c\/p\u003e\n\u003ch4\u003eQ: What type of charger does the K400 voice amplifier use?\u003c\/h4\u003e\n\u003cp\u003eA: It charges via any standard USB 5V charger — your existing smartphone charger works perfectly. Just make sure the charger output is at least 500mA for efficient charging.\u003c\/p\u003e\n\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\": \"https:\/\/schema.org\", \"@type\": \"FAQPage\", \"mainEntity\": [{\"@type\": \"Question\", \"name\": \"Can the Rolton K400 voice amplifier be used outdoors for tour guiding?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"Yes! The Rolton K400 is specifically designed for both indoor and outdoor use. 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Just make sure the charger output is at least 500mA for efficient charging.\"}}]}\u003c\/script\u003e\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\": \"https:\/\/schema.org\", \"@type\": \"BreadcrumbList\", \"itemListElement\": [{\"@type\": \"ListItem\", \"position\": 1, \"name\": \"Home\", \"item\": \"https:\/\/oasis-select.com\/\"}, {\"@type\": \"ListItem\", \"position\": 2, \"name\": \"Gadgets \u0026 Audio\", \"item\": \"https:\/\/oasis-select.com\/collections\/gadgets-audio\"}, {\"@type\": \"ListItem\", \"position\": 3, \"name\": \"Rolton K400 Voice Amplifier \u0026 Headset Microphone Kit\", \"item\": \"https:\/\/oasis-select.com\/products\/rolton-k400-voice-amplifier-headset-microphone-kit\"}]}\u003c\/script\u003e","brand":"Oasis Select","offers":[{"title":"Rose","offer_id":47751381680233,"sku":"14:496#Rose","price":49.64,"currency_code":"USD","in_stock":true},{"title":"Black","offer_id":47751381713001,"sku":"14:175#Black","price":49.64,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0679\/7931\/3257\/files\/S599145a0b8ec43a5b4e8e859dd9e58e4M.webp?v=1783189181","url":"https:\/\/oasis-select.com\/products\/rolton-k400-voice-amplifier-headset-microphone-kit-1","provider":"Oasis Select","version":"1.0","type":"link"}