Traka21 Specifications Cabinet dimensions: (H)427mm x (W)246mm x (D)95mm Weight: 3.94kg Power supply: Input: 100-240V AC, Output: 15V DC Battery backup: DC12v 1.2Ah (optional) (H)54.5mm x (w)48mm x (L)97mm Power: 15v 0.7amp max Operating temp: Ambient, for indoor use only (-5°C to +50°C at 95% non-condensing relative humidity) Mounting: Wall Key positions: 21 Users per system: 1,000 Interface: PIN only Certifications: CE, FCC, IC