Operating Voltage 100-275V A.C., 50/ 60 Hertz. View Angle more than 120 degree. View Distance 200 mtr. Real Time clock with time retention of digit height 6". Wireless R.F. Remote Range 300 mtr. Shockproof/ Waterproof/ Rustproof housing. Horn / Siren available. Ram storage: Score will resume even after electricity breakdown/fluctuation.