Product Description: 1. External large waterproof button design, no fear of wind and rain! 2. Ultra-low power consumption, 35 hours of continuous music playback at maximum volume (there is no false mark in the actual test) 3. The latest Bluetooth V5.2 chip, high-fidelity stereo, clear and stable calls, faster and more stable transmission rate, the unobstructed transmission distance of more than 20 meters; 4. The incoming call is automatically answered (the call will be answered automatically if it exceeds 6 seconds), no need to manually operate, to ensure the safety of the rider; 5. SIRI intelligent voice assistant can be activated Product Parameters: Bluetooth version: V5.2+EDR Bluetooth protocol: HSP/A2DP/AVRCP/HFP Wireless frequency: 2.4026GHz-2.480GHz Frequency response range: 20Hz-20KHz Transmission distance: more than 20 meters Channel: Stereo Speaker parameters: 24/30mm Rated power: 2 x 30mW Sound pressure level: 1153dB Battery: 300mAh rechargeable lithium battery Playing time: 35 hours (playing at maximum volume) Call time:About 48 hours Standby time: more than 800 hours Charging time: 3-4 hours Functions: Switch previous song/next song, volume up/down, play/pause, answer/hang up/return call, wake up SIRI Parts List 1*Bluetooth headset 4*Hook surface velcro 4*Loop surface velcro 2*Windproof sponge cover 2*adhesive tape 1*USB charging cable 1*Instruction manual