Standard dipmeter for non harsh ground water level monitoring with an array of features including: Power Source: 9 volt battery (Duracell MN1604 specified by the manufacturer) Operating Temperature: Reel -20 to +40 °C / Probe -20 to +85 °C Reel: High tensile steel Dimensions: 340 x 250 x 200 mm Weight: up-to 7 kg max Probe diameter: 16 mm Probe length: 190 mm Probe: Stainless steel with EPDM Light indicator: Yes Noise Indicator: Yes (Buzzer) Self Test: Yes (in field)