Hearing aid Universal battery compartment replacement

This universal battery compartment replacement is designed for hearing aids, featuring a headset style with earplug wearing method. Compatible with both wired and wireless communication equipment, it utilizes a dynamic circular phonetic principle. Key specifications include a frequency response range starting at 1 Hz, an impedance of 1 Ω, sensitivity of 1 dB, distortion rate of 1%, a conductor length of 1 meter, and a speaker diameter of 1 mm.