CYCLINGBOX BG-1144 Mountain Bike Aluminum Alloy Brake Induction Seat Tail Lamp Double Track Tube, Diameter: 31.6mm

1. Material: aluminum alloy
2. Lamp beads: LED lamp beads
3. Seat tube diameter: 30.4/31.6mm
4. Mode: brake induction mode-slow flashing-constant light
5. Battery capacity: 500mAh
6. Charging port: Micro USB
7. Input: 5V-0.3A
8. Weight: about 358g for 30.4mm, about 367g for 31.6mm
9. Height: about 35cm

Features:
1. Aluminum alloy forging, high hardness matte texture, non-slip and not easy to loose, durable
2. Adjustable bow, you can adjust the angle of the cushion according to your own requirements
3. Built-in taillight design, built-in LED lamp beads, red light translucent, safer night riding
4. Brake sensor, safety warning, when driving normally, the tail light will light up in the warning light mode, brake and brake, the tail light will automatically light up for 3 seconds
5. USB portable charging, easy to use
6. The seat post has a clear scale for easy adjustment of the length of the seat tube

How to use the tail light:
1. Long press the switch button for 3 seconds, the red light will be on for 3 seconds, it means it has been turned on. When there is braking to slow down during riding, the tail light will automatically turn on for 3 seconds
2. Use of the warning light: in the power-on state, press the switch button again, the sequence is slow flashing, steady on, and off the warning light mode. In the warning light mode, the brake mode is valid at the same time
3. Shut down: long press the switch button for 3 seconds, the LED flashes twice to indicate that it has been shut down, it is recommended to shut down and save power when not in use for a long time