Speed set:1-4.2V. Our professional team will answer every doubt for you. We will reply to you within 24 hours. 12 better mosfets(make it smaller). Maximum current: 30±1A. 1 to 4 /1 to 5 cable(9 pins for throttle, e-bike, display).
When you pick wireless earphones out of the charging case, they'll automatically connect to the paired previous device. The range can reach up to 33ft away. When you put it back, the bluetooth earphones shut down and are recharging.