All features are available at Android 4.4 (API level 19) and higher

[Features]
- MAC address
- Classic and LE separately
- The strength of the received signals (RSSI)
- Displaying the change of connection status
- List of services in detail
- Settable discoverable and discovery time

[Note]
RSSI is the strength of the received (wireless) signal, in the unit of dBm (decibel-milliwatts), which is affected by distance, direction, obstacles, etc. The strength in 802.11 radio networks ranges from -10 as the maximum, to -100 as the minimum. The ranges from -20 to -50 indicates a good strength, and below -80 does somewhat a poor one.