Half helmet mounting:1 Tear off the 3m adhesive paper above the fixed seat tape and stick it on the left side of the helmet; Put the QQ on the headset on the fixed seat. (Do not arbitrarily remove after pasting, the maximum viscosity after 24 hours).2. Attach the Velcro on the headset to the ear bag inside the helmet, and fix the horn at the ear bag; The microphone's Velcro is attached to the inside of the helmet under the left ear pocket to secure the microphone.Make sure the microphone is close to the mouth for best results, and keep the mouth of the microphone user at 1-2 cm while the microphone is installed).3. Connect the speaker microphone cable plug to the headset.Full helmet mounting:1. Tear off the 3m adhesive paper above the fixing seat tape and stick it on the left side of the helmet; Tap the QQ on the headset on the fixed seat. (Do not arbitrarily remove after pasting, the maximum viscosity after 24 hours).2. Attach the Velcro on the headset to the ear bag inside the helmet, and fix the horn at the ear bag; The microphone's Velcro is attached to the inside of the helmet at the mouth to secure the microphone.3 Connect the speaker microphone cable plug to the headset.Product size: 103*50*26MM.Bluetooth version: 5.0.Material: ABS+TPU.Battery: 3.7V/800mAh.Charging time: 2G.Working time: 20h.Waterproof class: IPX6.