Intended use: SATEL. External dimensions of the enclosure: W=250, H=250, D+D1=80+8 [+/-2 mm]. External dimensions of the front panel: W1=255, H1=255 [+/-2 mm]. Transformer: TRP 20VA/16V/18V, IP30. Fitting battery: 7Ah/12V. Tamper protection: tamper – opening of the enclosure. Notes: surface mounted enclosure, locking – bolted x4, distance from the wall - 8mm.