Accessory in the form of padlocks (complete with a padlock) of the European DIN standard with a built-in network controller and an RF ID reader of 125 kHz IDs. Memory for 3000 IDs. Power: 4 AAA sized batteries for 32,000 openings. Operating temperature range 0 … + 55°C. Communicate with the U-Prox IP server via the U-Prox IC L communication controller and the 868 MHz U-Prox HE radio hub.