FM Wireless Microphone (330-1076) Preparation Faxback Doc. # 15282 The FM Wireless Microphone uses a 1.5 volt battery. We recommend our 23-115 (LM-44 or equivalent). Open the microphone case by placing a dime in the slot at the bottom of the unit. Twist the dime gently. The front of the case should lift off easily. Install the battery with the positive (+) side up. The positive side will usually be marked with a "+". Make sure the battery is fully inserted in the proper position. (ALL-07/20/95)