Equipped with Shure's BETA 58 mic capsule, the Axient AD2 handheld transmitter delivers world-class sound and maximum reliability—even in the most congested wireless environments. Two operation modes optimize performance for any application: Standard mode provides maximum coverage, while High Density mode allows for greatly enhanced channel counts. Axient AD2 handheld transmitters can be powered with AA batteries or with Shure's SB900A rechargeable battery for up to 9.5 hours of performance. You can count on the Shure Axient Digital AD2/B58 wireless handheld microphone transmitter with BETA 58A capsule in the most mission-critical applications.