Silicon Labs BT122-DK4315B BLUETOOTH® LE Module Development Kit is a small kit for evaluating the BT122 module. The Silicon Labs BT122-DK4315B board contains two push buttons, two LEDs, and a temperature and relative Si7021 humidity sensor. The board also has a J-Link debugger with a high-speed UART to USB bridge. The BT122-DK4315B also contains a mini-simplicity connector which allows for current consumption measurements using BRD4001A and energy profiler and breakout pads for all the module pins.