Features: Touchless measurement avoids cross-infection. Infrared accurate measurement, small error. Switching between °C and °F. Audio and visual fever warning. The alarm value can be set(the default value of this product is 37.5°C). Various charging methods: it can be charged by USB wire, portable charger, or batteries. Multiple installation methods: can be mount on the wall or install on the bracket, convenient to use. Install and replace the battery: remove three screws, open the back base and install the battery. Suitable to use in the office, home, school, factory, or any other public. Specifications: Screen: Digital Display Accuracy: +-0.2 Degree Response Time: 0.5s Abnormal Automatic Alarm: Voice Measuring Distance: 5cm - 10cm Power Supply: 3 PCS of AAA Battery or DC5V 1A(not included) Environment Temerature:10°C-42°C Standby: About One Month Installation: Hook Up / Double-sided Tape / Bracket Fixing Thermometer Size: 16.8 * 11.2 * 3.3cm / 6.6 * 4.4 * 1.3in Package Size: 18 * 12 * 7cm / 7.1 * 4.7 * 2.8in Package Weight: 290g / 10.2oz Packing List: 1 * Thermometer