Model:HC-90K

Function Features：

Nice and smart design, easy installing.

Intellectual single chip process and steady and credible self-testing.

photo-sonic alarming and restore automatically

Usually installed on the ceiling of living rooms, aisles etc.

Specifications：

Operated by 9V battery

Emitting distance ≥100m（Open air）

Battery can last ≤1 year

Detecting area：20 square meter