SHURE Axient Digital AD2/SM58 Handheld Wireless Transmitter with SM58 Microphone Band 1 Black AD2/SM58 delivers impeccable audio quality and RF performance with wide-tuning, High Density mode, and encryption. Features durable metal construction, rechargeable power with dockable charging, and black finish. Works with Axient® Digital Wireless Systems Features the SM58® cartridge Offers more than 11 hours of continuous battery life with Shure lithium-ion rechargeable batteries or 8 hours with AA batteries at 10 mW Includes AD2/SM58, microphone clip, zipper bag, 2 AA batteries, and user guide