Wolf Guard Wireless 433MHz Door Window Alarm Security (2x2,White,10 Pack)

BRIEF: This product is consist of a transmitter and a magnetic stripe, when the magnetic stripe box is removed, the transmitter will send a wireless alarm signal to the host SPECIAL: Imported chip, ultra-low power consumption, stable performance POWERFUL: Battery dies so fast ?? NO! We use huge capacity lithium battery---3V CR2450 lithium battery, more than 1 year standby time. Also battery is include, you no need to buy battery before use it advance,Low-voltage alarm SENSITIVITY: Wireless alarm signal when door or window open. Tamper alarm and No false alarms USEFUL: Our door and window sensor need to format the code with your own home alarm system before to use it. ONLY Work well with Wolf-Guard system, Manufacturer: ChiTongDa