Shure GLXD-RE14/MX53, Wireless Earset Microphone System, GLXD advanced instrument system, Digital 2.4 GHz wireless system consisting of a 9.5"" GLXD4RE receiver, a GLXD1 pocket transmitter, and an MX153 earset microphone, Up to 11 systems can be operated simultaneously, Up to 9 systems can be operated under typical conditions with WLAN and Bluetooth devices in the same environment (optional UA846Z2 Frequency Manager required (not included)), Automatic frequency setup, Pilot tone, Microprocessor-controlled antenna diversity, Displays battery life in hours and minutes, Remote controllable transmitter gain, Integrated battery charge port, Metal pocket transmitter, Metal receiver, Detachable antennas on the rear side, XLR- and jack outputs, High-resolution LCD display, Up to 16 hours of battery life, Has a transmission range of up to 60 m, MX153 condenser earset microphone, Frequency response: 20 - 20,000 Hz, Directional characteristic: Omnidirectional, Colour: Beige, Includes a Shure lithium-ion battery, a rack kit, UA802-RSMA antenna cable, 95A21651 USB cable, PS43E power supply and an MX153 earset microphone