WEB LINK: https://www.sonicinformed.co.za/catalogue/surveillance/smn-ds2300-4;

Smanos DS2300/4 Wireless Door And Window Contact Alarm With ABS Plastic Casing And LED Status Indicator And DC3V Power Supply - White Colour

Features:
-The DS2300 works well with any door, window or opening
-When triggered (separated), an alarm signal will be sent to the system for appropriate response
-It also comes with tamper protection to enure system integrity, and can work with other wired detectors

Specifications:
-Power Supply: DC 3V (CR2032 button cell battery x 2)
-Static Current: = 1 uA
-Alarm Current: = 10.5 mA
-Transmitting Distance: = 80 m (open area/no interference)
-Radio Frequency: 868 MHz (±75KHz)
-Housing Material: ABS plastic
-Operation Condition: Temperature -10°C ~ +55°C
-Relative Humidity: =80% (Non-condensing)
-Transmitter Dimensions (LxWxH): 72 x 28 x 10 mm
-Magnet Dimensions (LxWxH): 58 x 14 x 9.5 mm

-Weight: 200g
-Dimensions: (L)15 x (W)11 x (H)5cm

What's in the box:
-1x Smanos DS2300/4 Wireless Door/Window Alarm Contact