IMS-4210 Wireless External Temperature Sensor with 12 Ft of Wire IMS-4210-E Wireless External Temperature Sensor provides remote temperature monitoring without running wires. Sensor's external probe has 12 feet of wire intended for monitoring temperatures in refrigerator/freezers or other harsh environments. Sensaphone Receiver Node for Wireless Sensors IMS-4200 Not included uses an integrated 2.4GHz wireless radio that receives temperature data sent by the sensor. Indoor range up to 250 ft. Line-of-site even greater distances. The IMS series of wireless sensors also feature mesh networking technology. Each sensor can be used as either a wireless sensor/router or as a low-power battery operated sensor. When used as a router, greater distances can be realized because each sensor/router adds another 250 feet of range to the system. This sensor comes with 3 AA alkaline batteries powers the sensor for up to 2 years end device mode . Option plug-in power supply allows the batteries to function as backup power if main AC power fails. IMS-4210-E Wireless External Temperature Sensor Specifications Product # IMS-4210-E Operating Temperature Range 32 degrees to 122 degreesF 0 degrees to 50 degreesC Monitoring Temperature Range 109 degrees to 115 degreesF 85 degrees to 57 degreesC Operating Humidity 5-90% RH Sensor type 2.8K Thermistor Accuracy /- 1.8 degreesF 1.0 degreesC Power Requirements 3 AA Batteries / 5VDC Power Supply Router Mode Wireless Technology ISM 2.4GHz, 100 mW 20dBm Housing White plastic Dimension/Size 6.8 in. x 3.5 in. x 1.5 in. Compatibility IMS-4000 Wireless Node Package Contents x1 Wireless Temperature Sensor x1 External temperature probe x3 AA Alkaline batteries x2 Plastic drywall anchors x2 #6 Metal tapping screws This item ships from a separate warehouse and may require extra time for delivery.