Bluetooth temp data logger ——BT05B Andriod&IOS APP support One button operation, easy to use 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 * External highly sensitive temperature sensor * Real-time display temperature * It can store 12000 pieces of temperature data * PDF report can be sent to specified email * LED light indicates the working 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 data interval and alarm storage temperature data interval Specifications : Dimension N.W Signal transmission frequency Protocol standard Modulation mode Send interval Built-in battery Output power Communication rate Transmission distance Storage Battery life Operating temperature range Temperature detection accuracy 1Mbps 55 meters, adjustable Can save 12000 temperature data 1 year (depends on the mode of operation) -40℃~+80℃ (external sensor) ±0.5℃(-20℃~+40℃), ±1℃ (other tem