【The Thinnest Motorcycle Bluetooth Headset】:With technology and product upgrades,our HM-1 Pro headphones are 0.45 inches thick and fit into the headphone holes of most helmets without squeezing,making them ideal for riding. | 【Hi-Fi Stereo Sound Quality,Louder,Noise Reduction,FM】:You can enjoy the best Hi-Fi stereo music,FM radio or GPS from the HM-1 Pro motorcycle Bluetooth headset with professional sound decoding chip,40MM diameter and 0.3 watt headphone units that have high quality sound effect and louder volume.Also it adopt ENC (Environmental Noise Cancellation) technology and microphone that make calls clearer. | 【Stable and Fast Signal Transmission】:The HM-1 Pro helmet Bluetooth headset use the latest 5.2 Bluetooth version has the following improvements:Stronger compatibility,can be paring with most Bluetooth devices such as phone,MP3,MP4,Navigator,GPS.Quick pairing.Reconnect automatically.Signal stability.Low power consumption.30 meters connection distance. | 【Large Capacity Battery and IPX7 Waterproof】:The HM-1 Pro helmet Bluetooth headset adopt double professional large Capacity batteries.You will get 500 hours standyby time,50 hours music/talk time,1 hour quick charge,real-time battery display on the phone,low power warning and power save mode.The HM-1 Pro motorcycle Bluetooth headset use IPX7 waterproof technology that can handle different weather conditions. | 【Large Button,Easy to Use and Faithful Customer Service】:The HM-1 Pro motorcycle Bluetooth headset uses large buttons,which makes it easy to operate even when wearing gloves, making it ideal for riding.We offer replacement or return.Contact us: Login your amazon account > choose "Your orders" > find the order ID > click "Contact seller".