IMS-4212 Wireless Dry Contact Sensor for Sensaphone Remote Monitoring IMS-4212 Wireless Dry Contact Sensor uses an integrated 2.4GHz wireless radio to send data from sensor to the IMS-4200 Wireless Node Buy Separately . Normal indoor transmission signal range of 250 feet. Line of Site increases that maximum range. IMS-4212 Wireless Dry Contact Sensor Specifications Product Number IMS-4212 Operating Temperature Range 32 degrees to 122 degreesF 0 degrees to 50 degreesC Operating Humidity Range 0-90% RH Input Characteristics 3M To 3V Power Requirements 3 AA Batteries / 5VDC Power Supply Router Mode Wireless Technology ISM 2.4GHz, 100 mW 20dBm Housing white plastic Size/Dimension 6.8 in x 3.5 in x 1.5 in Compatibility IMS-4000 Wireless Node Package Contents x1 Dry Contact Sensor IMS-4212 x2 Plastic drywall anchors x2 #6 Metal tapping screws The IMS series of wireless sensors also feature mesh networking technology. This allows each sensor to be usedas an end device, either as a wireless sensor/router or as a low-power battery operated sensor. Also, available is an optional plug-in power supply. This refers to when the batteries act as backup power if main AC power is not available. However, when the IMS-4212 is used as a router, AC power supply, not just the back-up battery power, is required. This item ships from a separate warehouse and may require extra time for delivery.