... Alarm Systems Support Contact ID, DTMF, 4+2EXPRESS Digital Alarm Receiver and Software Main Features1. Caller ID display and alarm; caller ... save, print, search, backup and restoration of police call data17.Receiver control for automatic voice deletion in accordance with the police ... consumption: 1.5mA(sleep mode)Operation temperature: -40 °C to +85 °C Please note:Due to GSM Data Card using the ...