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2. Rezence (wireless charging standard) - Wikipedia

   en.wikipedia.org/wiki/Rezence_(wireless_charging...

   The power transmission frequency is 6.78 MHz, and up to eight devices could be powered from a single PTU depending on transmitter and receiver geometry and power levels. A Bluetooth Low Energy link was defined in the A4WP system intended for control of power levels, identification of valid loads and protection of non-compliant devices. [3] [4]

3. Wireless power transfer - Wikipedia

   en.wikipedia.org/wiki/Wireless_power_transfer

   In general a wireless power system consists of a "transmitter" device connected to a source of power such as a mains power line, which converts the power to a time-varying electromagnetic field, and one or more "receiver" devices which receive the power and convert it back to DC or AC electric current which is used by an electrical load.

4. Bluetooth - Wikipedia

   en.wikipedia.org/wiki/Bluetooth

   Bluetooth is a short-range wireless technology standard that is used for exchanging data between fixed and mobile devices over short distances and building personal area networks (PANs). In the most widely used mode, transmission power is limited to 2.5 milliwatts, giving it a very short range of

5. WiPower - Wikipedia

   en.wikipedia.org/wiki/WiPower

   WiPower's system was based on modified coreless inductive technology and dynamically adjusts power supplied by the transmitter to power demanded by the receiver without the need for control systems or communication. [3] [4] As such, the company's technology represents a simpler design versus alternate wireless power solutions. [5]

6. Wi-Charge - Wikipedia

   en.wikipedia.org/wiki/Wi-Charge

   The system consists of a transmitter and a receiver. Transmitter connects to a standard power outlet and converts electricity into infrared laser beam. Receivers use a miniature photo-voltaic cell to convert transmitted light into electrical power. Receivers can be embedded into a device or connected into an existing charging port.

7. Bluetooth Low Energy beacon - Wikipedia

   en.wikipedia.org/wiki/Bluetooth_low_energy_beacon

   Bluetooth 2.1 improved device pairing speed and security. Bluetooth 3.0 again improved transfer speed up to 24 Mbit/s. In 2010 Bluetooth 4.0 (Low Energy) was released with its main focus being reduced power consumption. Before Bluetooth 4.0 the majority of connections using Bluetooth were two way, both devices listen and talk to each other.