Origin:Mainland China Certification:NONE RC-4HC USB Temperature Data Logger External Sensor 16000 Point Temperature Recorder Built-In NTC Sensor Theory:Thermometer Hygrometer Measure Type:K Model Number:RC-4 Max Measuring Temperature:49Celsius & Under Display Type:DIGITAL Usage:Household Power Type:Button Battery Style:Handheld Display Size:1.9 Inches & Under Is Smart Device:NO Temperature measuring range: 30 Celsius-+60Celsius for optional external sensor:-40Celsius-+85Celsius Resolution:0.1Celsius Record capacity: 16000 points (MAX) Temperature Logger:Data Logger Temperature Data Logger:RC-4 Logger RC-4 Recorder:Temperature Recorder Colour:White Material:ABS+Electronic components Package Contents: 1 x Data Logger 1 x External Sensor 1 x USB Cable 1 x English manual Only the above package content, other products are not included. Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.