CAT S61 Black 5.2 64GB 4G Unlocked and; SIM Free . Key Features Unlocked and; SIM Free 4G Ready for ultra fast network speeds Ultra-sharp 16 Megapixel rear camera and; 8 Megapixel selfie camera 5.2" Full HD Corning® Gorilla® Glass 5 DisplaySuper fast Snapdragon™ 630 Octa Core Processor + 4GB of RAMAndroid 8.0 Oreo OS64GB Storage + micro SD card slotIntegrated thermal camera!Features laser assisted distance measure! . INTEGRATED THERMAL IMAGING CAMERAThe integrated FLIR® thermal imaging camera on the Cat S60 and the latest Cat S61 smartphones can be used to monitor and diagnose problems more quickly and save time on siteIt provides a new perspective and opens up new use cases including detecting heat loss around windows and doors; spotting moisture and missing insulation; identifying over-heating electrical appliances and circuitry; and seeing in complete darknessThe upgrades on the new Cat S61 include an expanded measurable temperature range to 400º Celsius compared to 120º Celsius on the Cat S60 and an upgrade from VGA to HD detail from the visible camera providing unmatched image optimization using FLIR's MSX® technology. Just tap the MyFLIR app on the device to get started. DISTANCE AND AREA MEASURINGThe Measure app on the Cat® S61 uses the device\'s in-built laser and rear camera to establish depth and calculate distances. It can be used to measure the distance from the device to a surface and to estimate areas on that same surfaceIt can be used to calculate quotes or the materials needed for wall tiling wallpapering or painting jobs flooring or skirting board fitting running piping or cable or for preparing floor plansThe Measure app helps you to capture images on site that can then be used later to estimate sizes and dimensions. It\'s a convenient way to take on-the-job measurement estimates without a tape measure. It\'s the perfect tool for tradesmen DIY enthusiasts interior designers estate agents or realtors home insurance assessors and many other professions. INDOOR AIR QUALITY MONITORGet useful temperature and humidity readings with the integrated indoor air quality monitor of the Cat® S61 smartphoneWith the Air app on the device you can quickly understand the moisture levels in your working environment. It is useful for rooms without an extractor fan or regular ventilation and where opening a window alone doesn\'t always completely remove all the moistureYou can also use it to help you understand when a freshly plastered wall is ready to paint..