Input voltage (V) C5V Luminous efficiency of lamp (lm/w): 100 Color rendering index (Ra): 80 Dimmer supported: Yes Service life (hours): 50000 Working hours (hours): 4.5 Power supply: Rechargeable battery Lighting period (hours): 5 Battery type: lithium Lamp body material: ABS Light source: LED Product Name: Outdoor Headlamp Fishing Headlight Material: ABS plastic Size: 65*28*30mm Weight: 92 grams Battery: Lithium polymer battery Brightness: 500 liters Light mode: medium high down low, long press 3s, motion sensor activation. Duration of discharge: 4.5 hours Charging type: USB charging