Wireless Transmitter - Normally Open

Transmitter Overview
You can connect any wired sensor to this normally closed wireless transmitter. The You can connect any wired sensor to this wireless transmitter. It supports both normally closed and normally opened circuits. The transmitter operates on a 3-volt lithium battery and is compatible with any wired sensor. It should be clearly noted that this device does not supply AUX power to your wired sensor.
 
-- Transmitter Specifications --
Battery: 1x CR123 or CR123A
Battery Life: 2-3 Years
Antenna Range: 250 ft. – 450 ft.
Frequency: 433mhz
Encryption: 36 Data-Digit
Current: 15uA
Best Working Temperature: 14°F – 122°F

-- Transmitter Dimensions --
Transmitter: 3.19 x 1.26 x 0.98 inches (8.10 x 3.20 x 2.49 cm)