The D560 is powered on and off with a simple twist of the head. Complete with Lanyard & Spare O-ring Lumens: 180 with 1 x AA battery, 630 with 14500 battery Burn time: 1.25 hours with 1 x AA battery or 1hr @ 630 Lm LED: Cree XM-L2 (U2) with a 50,000 hour burn life Depth Rating: 150m Weight: 47.5g (excluding battery) Size: 92mm x 20mm x 24mm