Ezurio 453-00174-K1 Development Kits FOR TWO-WAY RANGING DEMO, TWO DVKS & ONE BL654 USB ADAPTOR REQUIRED. FOR 3D POSITIONING FOUR DVKS AND ONE BL654 USB ADAPTOR REQUIRED Bluetooth Dev Tools - 802.15.1 Dev Kit, Ultra-Wide Band & Bluetooth LE Modules, Sera NX040, MHF4L