Features: 
* One Magnetic Sensor can match with at most 8 remote controllers freely. 
* One remote controller could control several magnetic sensors. 
* Excellent Home use product, Tiny and fashion. 
* Volume: 110DB. 
* Alarm and door bell function for your option. 
* Low energy and long work time. 
* Simple install. 

Specifications of Magnetic Sensor: 
Voltage: 3V AAA*2pcs(Not Included) 
Stand-by Volume: 100uA 
Alarm Volume: 30mA 
Frequency: 433MHZ 
Alarm Response Time: 200ms 
Stand-by Time: 8-12months 
Magnetic Sensor Size: Approx.8.5*5.2*1.5cm/3.35*2.05*0.59in 

Specifications of Remote Control: 
Voltage: 12V 12V27A*1pcs(Included) 
Stand-by Volume: 1uA 
Working Volume: 15mA 
Stand-by Time: 8-24months 
Remote Control Distance: 20m/65ft 
Remote Control Size: Approx.5.7*2.9*1.0cm/2.24*1.14*0.39in 

Package Size: Approx.11.7*7.0*3.9cm/4.61*2.76*1.53in 
Package Weight: Approx.86g/3.04oz 

Package List: 
1 * Magnetic Sensor(batteries not included) 
1 * Magnetic Stick 
1 * Remote Control