Bluetooth 5.0 Motorcycle Helmet Headset Headphone Speaker Hands-Free Features: Helmet Bluetooth headset, freeing hands to ride more safely. Bluetooth 5.0, automatic answering, intelligent noise reduction, stereo sound, voice prompts Helmet Bluetooth headset application range: motorcycle riding, rock climbing, skiing, takeaway Compatible with all helmets on the market: including full helmets, 3/4 helmets, retro helmets, open-face helmets, and rally helmets. No need to reach for the mobile phone to answer the call, automatically answer the incoming call, which is safer and more convenient. Built-in rechargeable lithium-ion battery 250MA, long standby time, and long working time. The standby time is about 700 hours, and the charging time is about 1.5 hours. Clear sound quality, built-in noise, and echo cancellation technology, presenting high-definition stereo effect, one-click clear call. Specifications: BT version: 5. Frequency: 2.402GHz-2.480GHz Range: 0-15 meters (depending on equipment) Transmission distance of microphone: <= 1 meter Lithium battery: 3.7V/250mA Playtime: <= 7 hours Charging voltage: 5V Charging time: <= 1 hour Standby time: <= 70 hours The earpiece has a thin design, is less than 1cm, is more comfortable to wear, is louder, has intelligent noise reduction, and has delicate sound. Packing list: 1x Host 1x Charging cable 1x English manual 2x Magic sticker