Features: Ultrasonic wlede and excellent waterproof. 1 master, 3 slaves. Compatible with any car and alarm system. Specificaion: Working voltage: dc12v +/- 2v Load current: 2.3a No load current: 0.15a Flexible distance: 18 +/- 1mm Dynamic torsion: 4.5 -5.5kg Control time: 0.2s Longevity: 100, 000 times Working temperature: -40~+65ípc 33*32*52
