COMPATIBILITY - This senor pad compatible with GleenMed Wetting Pad Alarm ONLY. This must have an existing monitor in order to be used. PROTECTION AND DURABLE - With proper cleaning, the sensor pad can last a long time although we recommend to replace with a new one after 6 months for Hygienic reasons. All devices are FCC and CE certified. EASY PAIRING AND MULTI CONNECTIONS - The sensor pad can be connected to alarm by a cable, or wireless via a converter. Simply plug in the cable to the converter, and then press the 'Pair' buttons on both the alarm and converter to start pairing. Each alarm can connect up to 4 devices, each device corresponds to one LED indicator inside the lighting chamber.