Intended use: SATEL. The construction compliant with EN50131, grade 3. External dimensions of the enclosure: W=340, H=400, D=110, D1=15 [+/- 2mm]. Transformer: TRZ 50VA/16V/18V/20V - IP43. Fitting battery: 17Ah/12V. Tamper protection: tamper – opening of the enclosure, detachment from the wall. Notes: surface mounted enclosure, locking – bolted , distance from the wall - 15mm.