KS-SF22R 1 alarm connects with 3 remotes 

*1 remote can connect with unlimited of alarm sensors , 1 alarm sensor can connect with up to 8 pcs of remotes
* KS-SF22R Newly design ,
* Vehicle Anti-Theft Alarm,Super Loud 113dB,
* Triaxial Accelerometer Sensor,7 Stages Sensitivity for adjustment ,3 volume adjustable
* SOS Emergency Help Function,6 Tones Loud Siren Sound Selectable ,
* Long-range Wireless,3*AAA Batteries for Power Supply .life last for 12 months .
*waterproof :IP65
*Range :20-80M