Wireless Receiver Kit MDR-FM101K Purchased in July 1994. Operation confirmed with AA batteries. Since I don't have gum batteries, I cannot confirm operation with gum batteries. The earphones cannot be removed. The left side of the earphones does not work, but the right side works. As shown in the 11th image, the clip for attaching to clothing is broken, and cellophane tape has been applied. Wireless reception is noisy and inaudible when more than 30cm away. Will be shipped via Nekopos. This is a junk item due to the left earphone not working, etc. We apologize, but please understand that no claims or returns are accepted.