Head Dia x Length x Terminal Dia 55x 290 x 35 MM Power Led : 1W; 3W / Optional Material Body: Aircraft Aluminum Battery Type 3 1/2D Ni-Cd 2500 mAh Charging Time: 12 hours Operating Time: 1W / 140 minutes, 3W / 180 minutes Widely Used In Fire Control, Mineworker Security Villas, Household, Cars, outdoor Lighting and Travel Etc.