NF-521 has thermal imaging function and can display hot and cold spots on screen enabing users to oberve object temperature changes more effectively. It helpls you to quickly lock target area. standard 8GB memory card can save a large number of data which is a useful tool for fault maintenance. Features: High resolution. Visible light 2 million pixels 1024 thermal imaging pixels are clearly visible. 3 color imaging modes. instrument provides 3 color palettes: iron red rainbowcolor grey. Choose suitable color palettes to show details of target object. Two image-fusion functions. Contourline and thermal imaging-fusion display visible light and thermal imaging-fusion. This instrument supports two visual mode switching which can be compared according to two measurement diagrams to find fault point. It is an nice choice for electricians and maintenance technicians and can be used to quickly find problem area. Large capacity imagestorage. Standard 8GB memory card with large capacity can store various measurement data. USB to read data quickly. captured pictures saved in instrument can be viewed and exported by connecting to a computer which is convenient and quick. Specifications: Technical indexes: Infrared temperature measurement Temperature measurement : -10~400℃ Basic accuracy: ±2% or ±2.0℃ Emissivity: adjustable 0.1~0.99 Measuring resolution: 0.1℃ Response time: 150ms Spectral band: 8~14um Thermal imaging technique Thermal imaging resolution: 32*32（1024 pixels） Visible light camera: 2 megapixels Display resolution: thermal imaging thermal mixing digital camera Color palettes: iron red rainbowcolor grey Infrared spectral bandwidth: 8~14μm FOV: 33° horizontal IFOV: 18 mrad Thermal imaging sensitivity: 150mk Frame rate: ≤9Hz Image-format: BMP General parameters Display resolution: 320*240 pixels Battery: 3.7V 2600mAh Memory card: 8GB Working temperature:-10℃~45℃ / 14℉~113℉ Drop proof: 1m Main color: black+red Main material: plastics Item size: 210 * 120 * 60mm / 8.3 * 4.7 * 2.4in Package size: 230 * 140 * 80mm / 9.1 * 5.5 * 3.1in Package weight: 500g / 1.1lb Packing List: 1 * Thermal Imager 1 * USB Cable 1 * Memory Card 1 * User Manual