Feature: 1. Handheld: This versatile thermal imager is compact and lightweight with a 3.4in TFT display for handheld use. 2. Strong Battery Life: When the thermal imager is out of power, it can be used while charging, and the battery life can be up to ten hours, which is very convenient. 3. Indispensable Tool: Thermal imaging cameras can be used in a variety of situations and are important tools for home and industry. 4. Rugged Shell: The shell of the thermal imager is made of FR4 material, which can better ensure the internal components, is not easy to damage, and has a long service life. 5. Detailed Temperature Display: The thermal imager screen can display and track maximum temperature, minimum temperature and center point temperature. Specification: Item Type: Thermal Imager Material: FR4,PCB Model: MLX90640 Battery: 3.7V 1500mAh Li ion Battery (with built in battery) Application: Electronic Maintenance Equipment Basic Parameters: Infrared Sensor: MLX90640ESF–BAB Hardware Resolution: 32 x 24 pixel far infrared array Screen Resolution: 320 x 240 pixels Temperature Measurement Range: - 40℃-300℃ Measurement Accuracy: ±2℃ Working Temperature: 0℃-50℃ Working Humidity: ≤70% Refresh Rate: 8Hz Field of View: horizontal 55° x vertical 35° Emissivity: 0.95. Package List: 1 x Thermal Imager Note: This device is powered by a 3.7V lithium battery. It is recommended to keep the battery power display at about 50% before long term non use to avoid overcharging and overdischarging to prolong battery life.