Product material: ABS Bulb type: OSRAM 55 Lumens: strong 400LM, weak 120LM Function mode: main light: strong - weak - flashing, left side: white light strong - weak, right side: warm light strong - weak tail: running light Battery used: 3*18650 lithium batteries built in, 4200mA in total Type- USB C With CE/ROHS for free Can custom color