ATR3350-PRO - Professional, high sensitivity, omnidirectional version of the popular ATR3350/ATR35s lapel microphone (SP-LAV-1, HS, DM, 2M) High sensitivity -30dB microphone element Omnidirectional pick-up pattern No battery! Gets power from the device plugged into Requires 2-12vdc "plug in power' commonly found on computer microphone input, many camera input and most digital audio recorders - call 800-213-3021 with questions Includes metal lapel clip, windscreen and isolation mount with Velcro. Cable length 78"