The HIKMICRO Thunder is a thermal imaging device based on a 50 Hz sensor with a resolution of 384 × 288 and 17 micron technology, available in two versions - 25 or 35 mm . The attention is drawn by the large 0.39 inch OLED 1024 × 768 px screen that has been added to the Thunder series.It has 4 most popular display modes, with a choice of:White hot - warm, bright color. The higher the temperature, the brighter the element.Black hot - warm, dark color. The higher the temperature, the darker the element.Red hot - the image, like 'black hot', is red, highlighting the hottest elementsFusion - from high temperature to low temperature, the image is white, yellow, red, pink and purple.In addition, the mesh itself can change colour between green, red and white. The mesh itself can be turned off, which works well during a typical sighting.The HIKMICRO Thunder thermal imaging sight has the popular PiP or Picture-in-Picture feature, which allows the hunter to get a more accurate sighting while maintaining a wide field of view. The Thunder also utilizes digital zoom in the 2×, 4× and 8× ranges.The Thunder's sight construction is made of high quality polymer, which not only provides high impact resistance or adverse outdoor conditions, but also low weight. This makes the Thunder series the lightest in its class. The IPX7 standard confirmed sealing ensures full water resistance up to 1 m. The control panel is rubber covered and equipped with noiseless buttons.The HIKMICRO Thunder thermal imager is powered by two 3.0 V CR123 batteries (supplied), however the unit also allows the use of 3.7 V batteries. The operating time is up to 4.5 hours and can be extended by connecting a power supply (after removing the battery). Like all HIKMICRO cameras, the Thunder thermal viewer can record videos and photos in the built-in 16 GB memory.Comparison of Thunder TH25 and Thunder TH35 models : TH35 specifications.Detailed technical parameters of the TK35 :Manufacturer symbol: HM-TR13-35XF / W-TH35, sensor: 384 × 288 px / 17 μm / VOx, refresh rate: 50 Hz, NETD: 35 mk under (@ 25°C), F# = 1.0, lens: 35 mm / F1.0, angular field of view: 10° × 8° (H × V), linear field of view at 1000 m: 175 m, optical magnification: 2.14 ×, digital zoom: 2 × / 4 × / 8 ×, screen: 0.39" / OLED / 1024 × 768 px, object detection 1.4 × 4 m, screen: 0.39" / OLED / 1024 × 768 px, object detection 1.4 × 4 m: 3157 m, object detection 1.8 × 0.5 m: 1029 m, battery life: up to 4.5 hours, charging: USB-C / 5 VDC / 2 A / 1.5 W, operating temperature: -20 ° C to 55 ° C, resistance: IPX7, dimensions: 187.2 × 62.5 × 59.2 mm, weight: 390 g. TECHNICAL SPECIFICATIONSPage information Refresh rate 50 HzLinear field of view 100 m every 17.5 m Range 3157m Internal storage 16 GBDetector resolution (W × H) [px] 384 × 288 Display resolution (W × H) [px] 1024 × 768 Target size 35 mmDigital zoom [×] 2/4/8 Optical zoom [×] 2.14 Safety IPX waterproof class according to IEC 529 IPX-7 / OB 4 Additional information Structure / skeleton / body material polymer Dimensions Overall length 187mmWeight 390 g