KEY FEATURES: No-contact and hygienic temperature measurement. LCD display with backlight for dark condition. Uses infrared technology. Power Supply: DC9V Battery (included). Measuring Range: Body Temperature Mode: 32.0℃~42.9℃. Accuracy/Body Temperature Mode: Within range 35.0℃-42.0℃+ 0.2℃ -- Out of range 35.0℃-42.0℃+0.3℃.