The AMPP100 is an eco-friendly rechargeable 100 lumen light. It's lightweight and compact build makes it an ideal choice for all riders. Compact rechargeable headlight (100 lm)Easy to attach and remove, new rubber strap mountExcellent side visibilityLow battery indicatorUSB rechargeable (Micro-USB cable included)Mode memory functionTwo light modes (Constant / Flashing) Tech Specs Dimension： [AMPP100] 86 x 35 x 33 mm (excluding the rubber strap) [ORB RECHARGEABLE] φ27 x 27 mm Weight： [AMPP100] 62 g (light unit and battery) [ORB RECHARGEABLE] 25 g (light unit and battery) Light source： [AMPP100] High intensity white LED X1 [ORB RECHARGEABLE] Red LED x1 Run time： [AMPP100] Constant mode 100 lumens：approx 3.5hrs Flashing mode 100 lumens：approx 35hrs [ORB RECHARGEABLE] Rapid flashing ：approx 5 hrs Slow flashing :approx 5 hrs Constant ：approx 2.5 hrs Battery： [AMPP100] Li-ion rechargeable battery (3.7V-800mAh) [ORB RECHARGEABLE] Lithium Polymer rechargeable battery (70mA) Recharge time： [AMPP100] approx 2.5hrs (0.5A) [ORB RECHARGEABLE] approx 3.5 hrs (USB2.0 recharge) Mount size： [AMPP100] φ22.0～35.0mm [ORB RECHARGEABLE] φ22.0～32.0mm Recharge/discharge number of times： about 300 times（until the rated capacity drops to 70%） Water resistant： [AMPP100] IPX4 [ORB RECHARGEABLE] IPX4 Other： [AMPP100] Low battery indicator, lighting mode memory function,