TR30M, 30 LUMENS (USB) - Dimensions: 25 x 21 mm x 62 mm - 30 lumens - LED: Dual highly efficient LEDs - Mode: 1.7h (High), 3.2h ( Low ), 2.2h (Flashing), 15h (rapid flashing) 4.8h (pulse flashing) - Battery: 200mAh/3.7V rechargeable Li-Polymer Battery - Quick release clamp design compatible with 24-36mm seat post - Transparent pure red light body - Mounting angle adjustable to suit different needs - Weight: 22gr.