Easy, wireless home monitoring. When your SK6 Series wireless sensors are triggered, this alarm alerts you with sound and light. The alarm features 6 unique tones, so you can easily identify which sensor has been triggered. It also has a silent mode with flashing lights but no sound. Powered by 3 “C” batteries (not included), this alarm is portable, so you can move it from room to room depending on your needs or mount it on the wall without wires. Alternatively, an optional AC adapter is available for permanent installation without having to replace batteries. The alarm is compatible with any SK6 sensor. Available sensors include motion, door & window, water & flood, temperature, and power failure. It can also be triggered or silenced with our remote controls. It can be triggered from up to 40m (130ft) away.