Check the listing for details. 1 Recessed Door Window Terminal Security Alarm Sensor. Condition: New. Listed at 14.00 USD. Terminal Alarm Switch with magnetThis is for 1 SWITCH with magnet 3/8" Día with Terminal Switch Easy & Quick installation Longer Length Operate Gap ¾" (19mm) min. when the magnet is next to the switch, the loop is closed. When the magnet is pulled away the loop opens. Reed Switch Specifications Contact Rating: 10W/VA Switching Voltage (Max.) : 200 VDC Switching Current (Max.) : 0.5 Amp. Contact Resistance (Min.) : 150 milli ohms Life Expectancy: 10x 10 6 Operations Insulation Resistance: 10 9 ohms Shock Resistance: 30G for 11mSec. Vibration Resistance: 20G (10 to 1000Hz) Magnets: Rare Earth Plastic Material: ABS Plastic If you have any questions please Message BEFORE you buy Thank you for doing business with us Alarm Dealers Welcome