Feature 1Automatic Connection: The motorcycle helmet Bluetooth headset has an effective distance of 2030 meters (depending on the environment around the device such as obstacles), automatic connection, and strong signal. 2Long Play: Long standby and working time. Playing time: 45 hours. Support 48 hours standby time. Charging time 1 hour. 3High Quality Stereo Sound: These helmet headphones are noise canceling and deliver clear, high quality stereo music sound. 4Hands Free Calling: Hands free calling function, automatic answering or manual answering after broadcasting the caller's phone number. 5Applicable Scene: Compatible with all Bluetooth enabled smart devices, suitable for motorcycles, rock climbing, skiing, cycling, takeout, etc.Item Type: Motorcycle Helmet Bluetooth HeadsetMaterial: ABSBluetooth: 5.0Frequency: 2.402GHz-2.480GHzRange: 20-30 Meters (Depending on the Environment Around the Device Such As Obstacles)Transmission Distance of Microphone: 1meterLithium-ion Battery: 3.7V/180mAh Lithium Ion Battery (Delivery with Battery)Playing Time: 4-5 HoursCharging Voltage: 5VCharging Time: 1 HourStandby Time: 48 HoursConnection Name: BT8 Package List:1 x Motorcycle Helmet Bluetooth Headset1 x Micro USB Charging Cable2 x Hook and Loop