2.The taillight is fully charged in 2h, and the taillight is always on for 3h

3.The taillights need to long press the button to work!!!

Features:
USB rechargeable bicycle taillight and auto cut off when fully charged.
High quality internal lithium battery,only need about 2 hours to be fully
charged while be used for about 12 hours.
Long Steady Bright----2 Hours
Slow Flash----10 Hours
Super Flash----6 Hours
Strobe Flash----8 Hours
4 modes: Long Bright, slow flash, explosion flash and strobe.
Super waterproof, make you riding freely regardless of rain.
High brightness and energy saving LED.

Front Light (USB Rechargeable):
Material: PC+ABS
Size: Approx.65mmx29mmx23mm
Light Source: XPE 3W LED
Light Color: Black
Output (Maximum): 300lm
Lighting Distance: 30-50meters at night
3 Working Modes: High-Medium-Strobe
Power Source: 800mAh Li-Poly Battery
Charging Time: Approx.3hours
Running Time:
High: 3 Hours
Medium: 5 Hours
Flashing: 12 Hours
Fit Handlebar: 20-40mm

Rear Light (USB Rechargeable):
Size: Approx.7.5×3×2cm
Bulb Type: LEDs
Brightness: 15 lumens
Color: Red
LED Light: White, Red
Package Weight: Approx.50g
Mounting Placement: Bicycle Seat Post
Suitable Tube Diameter: Approx.12-32mm

If you don't know how to use the product or there is any problem with the product, please contact me to solve the problem first, I will reply as soon as possible, thank you!