FEATURES: 20 Hz to 20 kHz frequency range with flat response (actual response is microphone dependent) Interchangeable Shure microphone capsules, including the legendary SM58® AES 256-bit encryption for secure transmission Over 120 dB of dynamic range – no transmitter gain adjustment needed 1, 10 mW selectable RF output power Up to 9 hours continuous use with 2 x AA alkaline batteries Optional Shure SB900B lithium ion rechargeable battery provides up to 10 hours of continuous use and reports remaining runtime in hours and minutes External charging contacts for docked charging Backlit LCD with easy to navigate menu and controls Selectable display mode showing group/channel, frequency, or battery runtime 100 meter (330 ft.) line-of-sight operating range Rugged metal construction Frequency and power lockout
