The industry's lowest power consumption. TX 3.4mA, RX 3.1mA (3V powered) Sleep current 840nA in Deep Sleep mode. Compatible with DIALOG official evaluation board --ASICIC version, all ports have been led. Integrated QSPI FLASH W25Q16 on the board. The backplane matches the DA14681_EXP_BOARD expansion board. Onboard relays, buzzers, potentiometers Onboard 3 buttons, 3 WLED, USB to serial port Lithium battery interface, lithium battery charging circuit Power supply 3 options: LDO, COIN CELL, LI Reserved current test port, auxiliary circuit and BLE circuit respectively power supply, to facilitate accurate assessment of BLE system current consumption. A single RGB colorful LED, give full play to your ideas. Reserved 4PIN pin P18 external JLINK SWD interface. Reserve a USB Type B connector (square port USB socket) to prepare for USB charging or USB DEVICE development. Expansion board reserved 4 sensor / display module interface, compatible with ARDUINO definition. Information Electronics has a variety of sensor modules optional. Most GPIO jumper cap can be used to choose whether or not to communicate, to facilitate the whole power evaluation.