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 LED lights on the battery gauge clearly indicate how much battery you have left. The adjustable fabric strap is comfortable and has just enough silicone weave to keep it in place. Whether you wear with the strap or attach it directly to a Klein Hard Hat, this light-sensing auto-off headlamp is the best choice for your everyday light. Temperature Range Operating/Charging: 32° to 113°F (0° to 45°C); Storage: 14° to 131°F (-10° to 55°C) Weight 3.2 oz (91 g)Overall Height 2.25" (5.7 cm) Battery Life All-On/Boost: 4 hr; Spot/High: 12 hr; Flood/Low: 22 hr Type Headlamp with Rechargeable Internal Battery Standard BC, CE, NR Can, REACH, RoHS Bulb Type LED Diameter €” Included Rechargeable Lamp, Bracket, Fabric Strap, USB Charging Cord; Instruction Manual Overall Length 1.38" (3.5 cm) Special Features Auto-off Light Sensor; Battery Gauge; Fabric Strap Lumens All-On/Boost: 400; Spot/High: 200; Flood/Low: 100 Drop Protection 6' (1.8 m) Material ABS Overall Width 3.13" (7.9 cm) Application Head Light; Work Light Headlamp Batteries 1 x Lithium-Ion, 3.7V Battery Weight 30.6 g Number of Lithium-Ion Cells 1 Battery Type Lithium-Ion Lithium Battery Package Contained in Product Lithium Content (Watt Hours) 6.29 Wh