We are offering 4 ch dvr power supply. Specification:- input voltages: 100 - 300vac input current: 400ma input frequency: 47hz - 64hz output load regulation: 12.00v - 12.50vdc output voltages: 12.00v dc output current: 3.00amp description:- these power supplies are designed to provide all the power requirements of cctv dvr. They have been designed to operate for wider ac input range (100 - 300vac) and to withstand the universal power conditions. They are designed with smps technology which makes them highly reliable, cost effective, compact in size and light in weight.