TR50, 50 LUMENS (USB) - Using Dual-rows COB LED and 800mAH high-capacity. - Sensitive touch pad to change brightness promptly - Dimensions: 19 x 35mm x 54mm - 50 lumens - LED: COB LED - Mode: 2.7 (High), 7.6h ( Low), 4 (Flashing), 25h (rapid flashing) 18h (pulse flashing) - Battery: 800mAh/3.7V rechargeable Li-ion - Quick release clamp design compatible with 24-32mm seat post - Front and side visibility - Angle Adjustable - Weight: 41gr.