Overall dimensions (LxWxH), not more than, mm: 390x130x134. Weight, kg: 3. Type of built-in autonomous power source: supercapacitors. Autonomous operation time from the built-in autonomous power source (in the absence of current from the overhead line), h: not less than 2 h. Wireless communication standard for data transmission: GSM 900/1800. Data transmission mode: GPRS.