BluetoothR low energy USB Micro Adapter BT-420 is designed to be fully compatible with the BluetoothR standard v4.0. It is a single mode dongle supporting Bluetooth v4.0 Low Energy. It presents the smallest form fact and high effective performance which enables you to simply connect to Bluetooth low energy devices that can operate for months or even years on tiny, coin-cell batteries. The applications of those devices include health care, sports and fitness, security, and home entertainment. Due to its smallest dimensions, high sensitivity, ultra-low power consumption, it is fit into your portable devices that has USB port.