The Fenix BTR20 Bike Light builds on the BT platform with even greater output, power supply options and remote Turbo activation. Featuring the Dual Distance Beam system and neutral white output up to 800 lumens, the 18650-powered BTR20 allows easy battery exchange to keep rolling longer and stronger. Features Utilizes Cree XM-L?T6?neutral white LED, max 800 lumens output Instant Turbo with the remote pressure switch Customized BA2B rechargeable battery pack, battery switch-out system Aspherical reflector with a wide beam angle Dual Distance Beam System Up to a 167 meter throw 4 brightness levels and one flashing mode Turbo: 800 Lumens High: 400 Lumens Mid: 200 Lumens Low: 80 Lumens Strobe: 200 Lumens Digitally regulated output - maintains constant brightness Low power warning on the headlight Built-in safety control circuit with over-discharge, overcharge, and overheat protection function Quick-attach O-ring mounting straps sized for 20mm-35mm handlebars Easy, secure adjustment of the light's direction Made of aluminum alloy and quality plastic IPX-6 Water Resistant in heavy rain or thick fog Bundled with EdisonBright AA/AAA battery sampler pack. (single use batteries) nbsp;