Radio frequency: 433MHz, Low standby power consumption, Side power on/off switch, Tamper/switch off alert transmission, Trigger range sensitivity adjustment, Selectable re-trigger delay: 5 or 30 seconds, USB programming port socket: Micro USB, Long range transmission - 400M+, Dimensions: 107 x 59 x 39mm, Weight: 40g, Power: 2 x AA batteries, Typical battery life 6-9 months (6-8 opps P/D), Low battery warning LED, Programming by USB lead with PC software Pager required