Streamlight Sledge Lithium Ion Battery/CR123A 600 Lumens LED Headlamp Black. It delivers up to 600 lumens of consistent output with a THRO mode that provides a short burst of 1000 lumens when extra brightness is needed. Ideal for users who value runtime flexibility and dependable performance in demanding environments. Specifications for Streamlight Sledge Lithium Ion Battery/CR123A 600 Lumens LED Headlamp: Manufacturer: Streamlight Color: Black Beam Color: White Light Output: 600 lumens Band/Strap Color: Black Application: Work Battery Type: Lithium Ion CR123A Bulb Type: LED Battery Life: 4.25 - 13 hours Water Resistance Level: IPX-4 Water Resistant Mark: 2 m Battery Quantity: 1 Features of Streamlight Sledge Lithium Ion Battery/CR123A 600 Lumens LED Headlamp High medium and low modes plus THRO mode for a short burst of 1000 lumens 600 lumens and 4.25 hour runtime on High Runtime up to 13 hours on low Accepts (1) rechargeable SL-B26 battery pack or (2) CR123A batteries Multi-function push-button switch easy to use with gloves 45 degrees tilting head especially handy for reading IPX4 water resistant. 2m impact resistance tested Package Contents: Streamlight Sledge Lithium Ion Battery/CR123A 600 Lumens LED Headlamp Elastic and rubber hard hat headstrap SL-B26 battery pack: 1 USB-C cord Streamlight 89019: Sledge Lithium Ion Battery/CR123A 600 Lumens LED Headlamp Black