and high quality,Mini pen design with a strap, portable Additional functions: 1.Auto power off after 15 seconds 2. Fahrenheit / Celsius Selection 3.Low Battery Indication Material: ABS Color: Black LED Lighting Selection Data Hold Functio Model: DT8220 Type: Pen shape Suitable for: Home use thermometer Temperature range: -50 Celsius to 220 Celsius / -58 Fahrenheit to 428 Fahrenheit Accuracy: +/-2% or 2 Celsius Repeatability: 1% or 1 Celsius Response time: Less than equal 0.8 second Emissivity: 0.95 fixed Working environment: 0-50 Celsius Relative humidity: 10% -95RH noncondensing Storage temperature: -20 Celsius to 50 Celsius Net weight: 100g Power: 2pcs x AG13 cell buttons (1.5V/each) Distance spot ratio: 1: 1 Recommend measuring distance: 10mm to 80mm Resolution: 0.1 Celsius or 0.1 Fahrenheit Package Contents: 5 x Pen Thermometer 10 x AG13 cell batteries 5 x User Manual this product is not suitable for measuring temperature of body surface,Forehead,Baby !