Nitecore 550 Lumens SRT3 (Option: Gray or Black) Defender SmartRing Tactical Flashlight with LumenTAC CR123A Battery Super bright and easy to use 550 lumen compact tactical light with Strobe featuring Cree XM-L2 LED & mode Selection Ring May use CR123A battery or AA Battery Red and Blue emergency signal lights Authorized Nitecore Distributor with US warranty service SRT3 Flashlight (Black Finish) with Lumentac CR123A battery