ThruNite Neutron2C v2 NW Handheld LED Flashlight Max 1040 Lumen with Extension Tube Run, Neutral White Multiple modes available: firefly, low, medium, high and turbo. Its max output can reach up to 1040 lumens The Light can be driven by one 18650, one cr123, or two cr123 batteries. The extension tube makes it perfect for your daily versatile uses Its Compact design fits comfortably in your pocket, backpack, or anywhere else you keep your light High efficient drive circuit with military grade IC and electronic component to ensure high output, 25.4mm diameter head well combined heat dissipation with throw. Memory functiontosetanymode(exceptforfirefly,turbo)forimmediateuse.