Feature: 1. Automatic Connection: The motorcycle helmet Bluetooth headset has an effective distance of 10‑15 meters (depending on the environment around the device such as obstacles), automatic connection, and strong signal. 2. Long Play: Long standby and working time. Playing time: 4‑5 hours. Support 48 hours standby time. Charging time ≤2 hours. 3. Stereo Sound: These helmet headphones are noise canceling and deliver clear, premium stereo music sound. 4. Hands Free Calling: Hands free calling function, automatic answering or manual answering after broadcasting the caller's phone number. 5. Applicable Scene: Compatible with all Bluetooth enabled smart devices, suitable for motorcycles, rock climbing, skiing, cycling, takeout, etc. Specification: Item Type: Motorcycle Helmet Bluetooth Headset Material: ABS Bluetooth: 5.0 Frequency: 2.402GHz-2.480GHz Range: 10-15 Meters (Depending on the Environment Around the Device Such As Obstacles) Transmission Distance of Microphone: ≤1meter Lithium-ion Battery: 3.7V/180mAh Lithium Ion Battery (Delivery with Battery) Playing Time: 4-5 Hours Charging Voltage: 5V Charging Time: ≤ 2 Hours Standby Time: 48 Hours Connection Name: BT8. Package List: 1 x Motorcycle Helmet Bluetooth Headset1 x Micro USB Charging Cable2 x Touch Fastener