Supply of Power Supply Unit with following spec. 1 ) input AV 220v to 260v2 ) output 3 volt to 4. 5 volt DC/ 500ma 3 ) battery 12v/ 7AH MF 4 ) Fuse protection- input AC and output DC 5 ) LED indication: input AC, output DC and 12 volt battery ok 6 ) Switches on/ off system Dc 3 volt to 4. 5 volt output 7 ) Container power supply unit will be having partition one for circuitry and one for battery. Make- Epsilon, bentron & anuvidyut.