The Guee Sol 700 Plus Ambient Light. The self-contained high lumen SOL 700 Plus offers alternative outputs (700, 500, and 250 lumens) to suit different riding environments. The CNC machined body is designed with GUEE's exclusive cooling technology, the built-in smart ambient sensor (SAS), gives the SOL 700 Plus the best performance in run-time and the release of heat. Recharged through micro-USB for convenience. A great Solution for touring/adventure riding!  Guee Sol 700 Plus Ambient Light Featurs   Aluminum 6061 CNC Machined case, made with Heat Free Technology Self-contained battery, compact size with a 700 lumen output 180 degree wide beam visibility for better visibility Tool free mounting bracket, ideal for use on and off the bike Built-in smart ambient sensor, increased run-time performance