Tail light Introductions:

Turn on or off, Press & hold for 1.5 seconds. Function mode, steady, fast flash, forward flash, rapid flash, running flash Brake Introduction: When riders brake during riding, tail lights sense it and auto-flash for 6 seconds to alert the driving cars behind The tail light has a light-sensing mode. When turned on, it automatically becomes bright in dark area, but not in bright area. The tail light has an auto-sleeping mode. When the bike stays still for 40 seconds, it automatically goes into sleeping mode; when senses a vibration, it automatically turns on the light. (With light-sensing mode, it does NOT turn on in bright area.) product information: Size, 68mm long, 28mm wide, 25mm high Weight: 62 g (Contain the packaging) Material: high strength PC material. Battery: 3.7V 500mA Charging Time, 2h Usage Time : Steady 10h, fast flash 15h, forward flash 18h, rapid flash 15h, running flash 20h USB charge coil, 25cm 1A Charging ways, 5V adapter, computer, USB power bank Attention: The sensor in the tail light can detect the direction automatically. So, to make sure of a more precise brake detection, the light must be mounted to the bike before use!