Warning: 1. As the Baile motorcycle wireless headset is an electronic device, please charge it for 4 hours before the first use, as the super low power may cause it to malfunction. 2. Turn off the BT of other devices without pairing now to allow the headphones to pair with the desired device. 3. The full face helmet is recommended for the fixed windshield can physically decrease the outside noise in part. If not, please position the windshield or adjust the microphone closer to your mouth for better pick-up of your voice. 4. To protect your hearing, use high volume only that you cannot hear clearly in conversation. 4. The host controller is IP56 waterproof, the handset is not. Do not soak in water. 5. Obstacles may affect the wireless signal transmission, if the connection is unstable, please check if there is a barrier between the headphones and the device. 6. Try more to familiarize yourself, you will love the Baile Wireless Motorcycle Headphones. If any query or need vedio instructions, please email us. Specs: BT version: 4.1 + EDR, A2DP, AVRCP BT name: B35. Frequency: 2.4 GHz. Battery type: 450 mAh rechargeable polymer. Charging voltage: DC 5V / 190mA. Charging time: 4 hours. Woking time: 10 hours. Standby time: 1 week Wireless range: maximum 55 yards unobstructed in open area. In box: 1 host controller. 1 earphone with microphone. 1 clip. 1 USB cable. 1 screwdriver. 2 screws. 1 user manual See more