7 1/8 overall. Neon yellow and black composition housing with lanyard. High color temperature white LED. Up to 183 lumens. 1 watt. Runtime: up to 5h, 45min. Visibility: up to 184m. 8,480cd. Submersible: up to 1m. Suitable for scuba diving applications. Recoil LED technology. Slide thumb switch. Uses four AA batteries (included). Hang packaged.