Handheld wireless system form GLX-D series that combines leading-edge LINKFREQ Automatic Frequency Management technology with best-in-class intelligent lithium-ion battery rechargeability to define the new standard for seamless operation and digital audio clarity. This set includes one GLXD4 receiver, one GLX2/SM58 handheld transmitter, a microphone clip, a power supply, rechargeable battery, a USB cable, and a carrying case. The single-channel receiver features revolutionary LINKFREQ Automatic Frequency Management (2.4 GHz frequency band) and an integrated battery charge port that can charge a spare Shure lithium-ion battery while the system is in use. It allows operation of up to 4 compatible systems in a typical setting, and up to 8 maximum under ideal conditions. The receiver features high-resolution LCD screen status display with real-time transmitter battery status displayed in hours and minutes (accurate within +/- 15 minutes), remote adjustable transmitter gain control and three-colour charge indicator LED. It also provides XLR and 6.3mm output connectors. The handheld transmitter features an integrated SM58 microphone cartridge, transmitting wireless audio with digital clarity and rock-solid reliability. It offers up to 16 hours of continuous battery life with Shure lithium-ion rechargeable batteries, and automatic linking capability with wireless receiver for seamless frequency changing. Typical operating distance is up to 30 m indoors (maximum of 60 m) under ideal conditions, and up to 20 m outdoors (typical, with a maximum of 50 m under ideal conditions.