Changing the Battery on Your ATR3350iS Lav Microphone
ATR3350-HD - Sound Professionals/Audio Technica - High Output Omnidirectional Condenser Lavalier Microphone - Includes power supply with On/Off switch and bonus 1/8" to 1/4" adapter - Walmart.com
ATR3350Omnidirectional Condenser Lavalier Microphone, Jack 3.5mm