1. In order to travel safer and easier for cyclists, this helmet headset is specially designed for mobile phone calls to stereo music playback and FM radio remote operation.2. Advanced CSR BT chipset and embedded headphone amplifier inside SSDB35 provide better phone call and stereo experience. Its delicate, compact and waterproof design makes SSDB35 a good companion for your cycling trips.3. Using Bluetooth 5.0 chip, more power saving, low latency, no noise, to achieve stable and high-quality audio transmission.4. Adopt CVC intelligent noise reduction, ultra-high sensitivity anti-noise silicon microphone and wind-proof noise microphone cover to ensure call quality.5. The product is designed with IP65 high-level waterproof, even if it is used in rainy and snowy weather, it will not be affected at all. Suitable for most full face helmets, open face helmets, rally helmets, half helmets, retro helmets.Product Name: Motorcycle Helmet HeadphonesModel: B35CBluetooth version: 5.0Supported protocols: A2DP and ACRCPBattery capacity: 450mAhCharging voltage/current: DV 5V/190mAFrequency: 2.4GHzAmplifier: HT4832SQFull time: 4 hoursStandby time: 160 hoursWorking time: about 10 hoursMaterial: ABScolour: blackPackage Contents:1 x Headphone host1 x Speaker Kit1 x Buckle1 x Charging cable1 x Installation accessories1 x English Instruction ManualOnly the above package content, other products are not included.Note: Light shooting 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.