Features: brand new and high quality After bluetooth-compatible is connected to the mobile phone, it can automatically answer, reject and hang up the phone, and support the last number redial. MP3, GPS, mobile phones and walkie-talkies can be connected via audio cable. DSP noise reduction and wind noise processing are used to ensure clear voice quality at high speeds. It can be installed on the full cover helmet that can cover the ears. The buttons are larger and can be easily operated with gloves. The headset and helmet are snap-fitted for easy removal and installation. The waterproof and sunscreen design of the keyboard panel is durable. It can be used in rainy and snowy days to make your outdoor riding more exciting. Long battery life,2600mAh battery,160 hours of continuous listening to music. Specifications: Material:ABS Size:Approx.13x10x6cm/5.12x3.94x2.36in Transmission Distance: 20 meters Battery Capacity: 3.7V/2600mAh Charging Time: 3-4 hours Music Duration: about 160 hours Standby Time: about 500 hours Speaker Size: 40mm/1.57in Sensitivity: 96db Bluetooth-compatible Version: 5.0 Bluetooth-compatible Protocol: A2DP/AVRCP/HFP/HSP Net Weight:180g Package Includes: 1x Motorcycle Helmet Headset note: Please allow 1mm errors due to manual measurement. Due to the difference between different monitors, the picture may not reflect the actual color of the item.