Designed for Safety compliance to UL 924; CAN/CSA-C22.2 No. 141-10 and NFPA requirements for 90 minute egress Open circuit / short circuit protection Operating temperature: 32°F/0°C to 122F/50°C Test switch / charging indicator light Emergency reaction time ≤ 1 sec Powder coat steel, stainless or galvannealed case Field-replaceable battery pack with quick connect: Ni-Cd / 9.6V / C2500mAh (x2) Min. Lead length: 6” UL1452 solid/18AWG 1000V/90°C Quality construction backed by 5-year warranty