Maximum Number of Speakers:2 Maximum Intercom Distance: Certification:none Origin:Mainland China BT5.0 Motorcycle Headset Outdoor Riding Helmet Headset With DSP+CVC Noise Reduction Function 1.TWS motorcycle headset for smooth communication, clear intercom, two-person intercom/CVC noise reduction/6 level waterproof/Bluetooth 5.0. 2. Suitable for a variety of helmet shapes, easy installation, suitable for a variety of helmet types on the market. Full Yue, Wild Helmet, Half Uncovered, Face Helmet, Retro Helmet 3. Whisper in the ear, clear intercom, U frequency band has the characteristics of relatively stable transmission, wide frequency band, clear voice, convenient mobile communication, and strong anti-interference ability. It is widely used in radio communication. 4. Level 6 waterproof is not afraid of challenges, carefully designed waterproof technology, not afraid of wind and rain, PX6 protective treatment, durable, not afraid of challenges. 5. Pressure button, anti-misoperation, physical pressure button design, to ensure that the blind operation with gloves can be clearly perceived and accurately operated during riding Intelligent noise reduction: DSP+CVC Bluetooth version: 5.0 Battery: 3.7V/800mAh Charging time: less than equal 2H Talk time: 12h Standby time: greater than equal 240H Waterproof grade: IPX6 size: 26x50x103mm Colour:black Material:ABS Package Contents: 1 x earphone 1 x fixed seat 1 x Integrated full helmet microphone speaker 1 x charging cable 1 x Color frame(random colors, don't accept the specified color) Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.