The Ecowitt WN34L weatherproof digital water thermometer with sensor provides accurate and instant temperature information. Perfect for any wet medium, including water, pool, spa, water, freezers and refrigerators. Features Measures temperature via 3 meter water resistant probe LED display for current reading IP65 weatherproof sensor transmitter Epoxy sealed sensor probe Configure for use with GW series gateway or HP TFT weather station consoles View readings directly on the WS View App Supports up to 8 channels (channels shared with WN34S sensor) Upload data to the Ecowitt weather server to view history graphs and download the date from the website 868MHz UK / European frequency Included WN34LA Multi-Channel Temperature Sensor with 3m probe Mounting bracket and fittings Manual available by electronic download Technical & Manual Temperature range: -40°C to 60°C (-40°F to 140°F) Probe length: 300cm Transmission distance in open field: 100m (300 feet) IP65 rated sensor transmitter and epoxy sealed probe sensor 868MHz UK / European frequency Sensor reporting interval: 77 seconds Power: 1 x AA 1.5V LR6 Alkaline battery estimated 12 months use A copy of the WN34LA manual can be viewed by clicking here.