6 Pin TI CC2640 BLE Serial Pass Through Bluetooth 5 Board For FSC-BT616,6 Pin Serial Port HDK
link:http://www.feasycom.net/bluetooth-development-board/6-pin-serial-port-hdk/6-pin-ti-cc2640-ble-serial-pass-through.html
6 Pin TI CC2640 BLE Serial Pass Through Bluetooth 5 Board For FSC-BT616