 Feature: 1. 4 Light Modes: A1 Mid Light On--A2 Side Light On--A3 3 Light On--A4 Flashing 2. With gear memory function: After any gear is turned on for 10s, it will be in A1 when the light is turned off and turned on again. 3. The backpack has 4 battery indicators and 3 red light warning lights. 4. Battery box power display: when charging, (25-50-75-100) lights up, discharging: (25-50-75-100) lights off, the switch of the battery box can still be controlled: full On-flashing. Specification: Charging time: 5-6H Working time: A1 10 hours, A2 5 hours, A3 3 hours Battery type: built in polymer battery 1800mAh Charging port type: Micro charging port Charging voltage: 4V Working power (W): 4W Working current (A): 1 Working temperature: -25℃ ～ 50℃ Colour: Black Waterproof grade: IPX4 Irradiation distance: 100 meters Product Net Weight: 214g Product size: 54*84*42mm Material: ABS+AL Color temperature range (K): white light 7000-8000 Package List: headlight + cable + color box |