Product information: Size: 10.8*5.2*4.4cm Color: Black Blue Red Material: ABS plastic Real 800 lumens Built-in 4000mAh battery Double T6 lamp beads Touch Waterproof Power Switch IPX6 Waterproof Built-in 120dB Bell Bell cable: 40cm USB Rechargeable Smart induction: When you stops Cycling for more than 3 minutes. The bicycle light will automatically turn OFF(In smart mode) When the bicycle light feels the vibration. It will automatically turn ON Smart induction model: When the outside light is enough. It automatically dims When the outside light is dimmed. It automatically brightens Right side: flat floodlight Left side: raised spotlight (Please note: both lights on sides only illuminate at the same time in warning mode)