Dri Eclipse Wireless Remote Bedwetting Alarm Anzacare No wires between alarm and sensor. DRI Eclipse™ alarm unit size: 3-1/4" x 1-5/8" x 1-1/8" (8.3cm x 4.1cm x 2.9cm) Designed like a small 'space rocket' for child appeal. High volume with a tamper-proof volume adjustment. Plenty of detecting area to detect the urine. The Urosensor™ can transmit to more than one DRI Eclipse™ alarm unit, and so there can be another receiver in a parent's or care giver's room. Special electronics for long term battery life of up to 3 years (not 7 days or 1 month as in some other alarms) The Urosensor™ docks on the DRI Eclipse™ alarm unit when not being used and engages a second level of the battery saving technology. World Patent Pending Urosensor™ technology - it’s the only non-metal urine sensor ever. So there’s no corrosion by urine, no skin irritation, and easy to clean for instant reuse. The special electronics make the wireless Urosensor™ the thinnest of them all.