What are the model numbers in the SK602 QH series system?
The QH series system contains a receiver and a motion sensor.
SK602 kit: it has a white color receiver, a white color sensor SK602-1.
SK602G kit: it has a grey color receiver, a grey color sensor SK602-1G.
The above sensors work with either receiver (white and grey), but they are not compatible with SK6 series receiver SK664.
The compatible AC adapter model number is SK600CHG1BL (black color only).
Please note that the SK602(G) can be operated with AC adapter alone, or on batteries alone. It cannot switch automatically from AC adapter power to battery power when AC power is interrupted. You have to remove the plug from the receiver so that the receiver can run on battery power.