1. This unit consists of Optics, Temperature Sensor Signal amplifier, Processing circuit and LCD Display.2. The Optics collected the infrared energy emitted by object and focus on the Sensor. Then the sensor translates the energy into an electrical signal. This signal will be turned out to be digital shown on the LCD after the signal amplifier and processing circuit.3.Spectral response: 8um -14um4. Data retention, C / F temperature unit conversion.5. LCD backlight, automatic shut-down6. 2 x AAA battery(Not Included)Specification: Package Weight One Package Weight 0.50kgs / 1.11lb One Package Size 20cm * 15cm * 4cm / 7.87inch * 5.91inch * 1.57inch Qty per Carton 40 Carton Weight 21.00kgs / 46.30lb Carton Size 42cm * 42cm * 32cm / 16.54inch * 16.54inch * 12.6inch Loading Container 20GP: 472 cartons * 40 pcs = 18880 pcs 40HQ: 1096 cartons * 40 pcs = 43840 pcs