Klein Tools€™ rechargeable headlamp provides three modes to fit your task: a bright, 22-hour floodlight; a brighter 12-hour focused spotlight, and a super-bright 400 lumen boost mode. You€™ll know when it€™s time to recharge the lamp, because the battery gauge clearly indicates how much battery you have left. Whether you wear with the adjustable silicone strap or attach it directly to a Klein Hard Hat, this light-sensing auto-off headlamp is the best choice for your everyday light. Battery Weight 30.6 g Temperature Range Operating/Charging: 32° to 113°F (0° to 45°C); Storage: 14° to 131°F (-10° to 55°C)Weight 7.04 oz (200 g) Standard BC, CE, NR Can, REACH, RoHS Lumens All-On/Boost: 400; Spot/High: 200; Flood/Low: 100 Number of Lithium-Ion Cells 1 Special Features Auto-off Light Sensor; Battery Gauge; Silicone Strap Included Rechargeable Lamp, Bracket, Silicone Strap, USB Charging Cord; Instruction Manual Application Head Light; Work Light Headlamp Overall Height 2.25" (5.7 cm) Diameter €” Type Headlamp with Rechargeable Internal Battery Overall Width 3.13" (7.9 cm) Batteries Lithium-Ion, 3.7V Material ABS Overall Length 1.38" (3.5 cm) Drop Protection 6' (1.8 m) Battery Life All-On/Boost: 4 hr; Spot/High: 12 hr; Flood/Low: 22 hr Bulb Type LED Battery Type Lithium-Ion Lithium Battery Package Contained in Product Lithium Content (Watt Hours) 6.29 Wh