Fangrui Product Details Electronic Ink Screen, White Paper Black Characters Show More Clearly In Desktop Mode, Open The Stand And It Can Be Placed Steady On The Desktop Wall Mode, Built-in Magnet Can Be Rotated To Adjust The Angle Ultra-wide Viewing Angle, Almost 180, It Is Easier To See The Temperature And Humidity In The Room Sensirion High-precision Industrial Grade Sensor With Fast Response, Accurate Measurement And No Drift Low Power Consumption, Battery Can Year With Bluetooth-compatible Function Automatically Record Temperature And Humidity History Data For Up To 30 Days (requires App Connection) Product Name:cleargrass Bluetooth-compatible Thermometer And Hygrometer Lite Product Model:cgdk2 Product Weight:59 Grams Screen Size Diameter:55 Mm Temperature Range:0- 50humidity Range:0 - Rh Wireless Network Bluetooth-compatible 5.0 Battery Type:cr2430 Button Battery (no Included) Colour:white Material:abs Size:diameter 74 Mm, Thickness 14 Mm Package Contents: 1 * Bluetooth Thermometer And Hygrometer Only The A