Abstract: An embodiment sulfur dioxide-based inorganic electrolyte is provided in which the sulfur dioxide-based inorganic electrolyte is represented by a chemical formula M·(A1·Cl(4-x)Fx)z·ySO2. In this formula, M is a first element selected from the group consisting of Li, Na, K, Ca, and Mg, A1 is a second element selected from the group consisting of Al, Fe, Ga, and Cu, x satisfies a first equation 0?x?4, y satisfies a second equation 0?y?6, and z satisfies a third equation 1?z?2.

Abstract: A multi-function electronic fishing float having an identification number automatically generates radio frequency (RF) signals, if a fish takes bait or is hooked. The generated RF signal is sent to a receiver, and an angler can clearly identify a sign of a fish's bite or hooking through sound, vibration, or light generated by the receiver, without checking the float with eyes. A transmitter sending RF signals corresponding to the fish's bite or hooking is installed in the electronic fishing float that partially comes up above the water surface by buoyancy, and the transmitted RF signals are received by the receiver outputting sound, vibration, and light as information on the fish's bite or hooking.