Bluetooth Temp/RH data logger ——BT04B Andriod&IOS APP support Temperautre and Humidity Measurement Bluetooth 4.0 technology and Nordic N51822 chip Small-sized, low-weighted, easily portable Features: * High accuracy and stability * Bluetooth 4.0 * Long distance wireless transfer * Built-in highly sensitive temperature and humidity sensor * Real-time display temperature and humidity * It can store 12000 pieces of temperature and humidity data * History report can be sent to specified email * LED light indicating for different status * Can choose time to query data, every time query of data, the stored data can be saved in history * Can set normal storage temperature and humidity data interval and alarm storage temperature and humidity data interval Specifications: Dimension N.W Signal transmission frequency Protocol standard Modulation mode Send interval Output power Communication rate Transmission distance Storage Battery life Operating temperature range Humidity detection range 1Mbps 55 meters, adjustable Can save 12000 temperature and humidity data 1.5 years (Depends on the mode of operation, can replace battery) -25℃~ +60℃ 0~100%RH Temperature detection accuracy Humidity detection accurac