Place of Origin : Shenzhen,China

1.Technical specifications :
2.Power voltage: standard 9V battery
3.Operating voltage: 7V-9V
4.Operating Current: <50mA
5.Alarm terms: sound (vibration) and light alarm simultaneously
6.Waterproof: IP31
7.Alarm Sound: ≥75dB(A)
8.Operation Frequency: 40KHz
9.Housing material: ABS- black
10.High Sensitivity:Pin: 30-60mm 64-Pistol : 180-195mm;
11.6 inch Knife: 160-180mm; Steel ball with 20mm diameter: 120mm;
12.One Yuan coin: 75-100mm.