Long battery endurance, low consumption Super Long Battery
Duration: 2500mAh built-in rechargeable Li-ion battery and Low energy technology， together bring you up to 2100 hours working time (headlight off, only odometer ON). It offers 4-8 working hours when you turn on the headlight depending on the mode you choose. USB Rechargeable charging, Please note, it can not be charged by a computer USB Port, only a Mobile phone charger and Power Bank charger Or it will continuously restart.
Bike computer: A bike speedometer with accurate tracking of speed and distance helps you to get more fun on your cycling trip or easily achieve your fitness goals. 12 FUNCTIONS BIKE COMPUTER: top/current/average Speed, distance, lighting, LCD backlight, clock, time, auto turn off/data storage, power saving, etc;
Backlight: 2.1-inch big screen LCD display with sustained backlight， allows you to read the digital clearly in the deep dark night or in a long tunnel. Keep pressing the SET key for 2 seconds to turn it on, and keep pressing the SET key for 2 seconds to turn it OFF.
Spotlight / Floodlight: the rang spotlight makes the bright longer, and the floodlight makes the bright wider. to make sure you will have clear vision at night. T6 LED 450-lumen headlight with 3 modes
Bike Bell: 120dB speaker provides a clear warning for passers-by riders and cars. Please enjoy cycling with this wonderful gadget at the anytime to feel your speed! Wired control. There are 3 kinds of sound modes. 120dB. Long press the button "SPK" for 8 seconds to select the sound mode that you want. Suitable for all kinds of users.
Instruction Guide: https://youtu.be/iyhkUJubdK0