PROTECTION AND DURABLE - GleenMed alarm provides alert immediately when the sensor pad detects moisture / wetness. There are 4 LED indicators flashing and alarm sounds to alert caregiver / kids. This alarm casing is made with plastic and surrounded with durable rubber for protection from low level drops. 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. THOUGHTFUL DESIGNS - This alarm provides 4 options of alarm sounds including normal alarm, two different melodies, and silent function; 2 sound level selection, 85dB and 100dB; Also, there is on/off, and a 2 second delay switch to meet difference needs. All buttons and batteries are hidden with screw lock to make sure only caregiver can change the settings, no tampering & child proof. 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.