Feature: Door magnetomete with urgent button; Adopting ultralow power chlip design; Checking report of low power trouble; Funcation of anti-dismantle and anti- destructibility 2262IC opted oscillation resistance (Outside enhanced antenna far emission distance hone / commercial window and door security alarm); Wireless frequence: 433MHz; Static current: <4.5mA; Alarm current: <10mA; Operating voltage: 12V; Emission Current: 15mA; Operating Temperature: -10'C~50'C; Emission Distance: 100 m (Open field); Decode: Fixed code by pins; Alarm time: 5 seconds; LED Indication of alarm and low battery: Yes; Built-in Battery 23A-12V battery (included useful life time 6-12 months); For SKU: SKU 247734 DP-40A / 248109 SN-9100 / 275911 DP-60