Rover WB, 12 watt dual beam halogen with water bottle battery for performance oriented riders and commuters Features: 12 watts of Intense Halogen Light, Dual beam reliability, Exclusive high beam pitch for better road coverage, Choice of 3 beam patterns, (6w wide, 6w narrow, 12w combined) Gel-Cel water bottle type battery, Side-to-Side swivel for excellent peripheral vision, Sleek, low profile, tough thermo-plastic casing, Quick release mount, Free shipping on orders over $100! Al's oneliner (668: The Neighbour of the Beast.) The Night-Rover Water Bottle offers all the features of the Night-Rover with the convenience and durability of the water bottle battery. Specifically designed for the night time commuter this system has two independent switches to control the 6w narrow and 6w wide beams for a total of 12 watts. Consistent in the Night-Rover series, the beams are pitched for better road coverage and the side-to-side swivel action allows even more beam control. This system is superb for commuting and easy evening riding, and ensures years of safe riding. The main difference between this light and the Standard Night Rover is in the Battery type. This light has a bottle type battery and the standard Night Rover uses a rectangular frame strap on battery.