Product Features 2,000 lumens Securely fits a broad range of weapons Uses one (1) Streamlight SL-B50 protected Li-Ion USB-rechargeable battery pack TEN-TAP programming allows for selection of three different operating programs Product Specifications High Lumens: 2,000 Run Time on High: 2.50 hours Run Time on Low: 11.00 hours Beam Distance: 266 meters Max Candela: 17,700 Battery Type: Streamlight SL-B50 Protected Li-Ion USB Rechargeable Battery Pack Battery Quantity: 1 Length: 6.30 inches Weight: 9.06 ounces Colors: Black