An electronic device includes an amplifier, a signal conversion unit configured to include at least one photodiode, in response to an optical signal being received from an external device, convert the received optical signal into an electric signal by using the at least one photodiode and output the electric signal, and a processor configured to control to supply power to the amplifier in response to the electric signal being received from the signal conversion unit, wherein the amplifier, in response to the power being supplied, receives the electric signal from the signal conversion unit, amplifies the received electric signal and outputs the amplified electric signal to the processor.

Systems and methods are provided for a multi-configuration electronic device carrying case. The multi-configuration electronic device carrying case includes a protective encasing structure configured to receive and hold an electronic device. The carrying case further includes at least two adjustable straps configured to attach the encasing structure to a person in one of a plurality of configurations. The configurations include a hip holster configuration, where one adjustable strap is used for connection around a waist of the person and one adjustable strap is used for connection around one leg of the person. The configurations also include a back configuration, where one adjustable strap is used for connection around each arm of the person to attach the encasing structure to a back of the person.

Systems and methods are provided for a multi-configuration electronic device carrying case. The multi-configuration electronic device carrying case includes a protective encasing structure configured to receive and hold an electronic device. The carrying case further includes at least two adjustable straps configured to attach the encasing structure to a person in one of a plurality of configurations. The configurations include a hip holster configuration, where one adjustable strap is used for connection around a waist of the person and one adjustable strap is used for connection around one leg of the person. The configurations also include a back configuration, where one adjustable strap is used for connection around each arm of the person to attach the encasing structure to a back of the person.