AKG-WMS4500 Wireless System (Band 8, 570.1-600.5 Mhz).  Includes SR-4500 Receiver and PT-4500 Pocket Transmitter.The SR 4500 true diversity receiver provides maximum ease of use and the widest range of functions in its class. Its accurate battery life readout is a previously unavailable, invaluable advantage in live sound applications. A complete line of accessories makes the SR 4500 your first choice for every application. The transmitter uses a pilot tone to transmit battery status data to the receiver that displays the remaining battery capacity. The pilot tone decoder also allows the detection and display of other important information including the current position of the transmitter MUTE switch.Auto Setup and Environment Scan functions automatically analyze the local RF environment, find usable frequency groups, and set frequencies. The SR 4500 operates in an extremely wide UHF band (30 MHz) and each frequency preset provides up to 19 inter modulation-free channels*. The maximum number of selectable frequencies is 1200. Using several frequency bands allows you to operate as many as 70 channels simultaneously. A large, backlit color display and a jog wheel make the SR 4500 easy to use and a programmable LED ring indicates important system parameters at a glance.Housed in a half-rack, all-metal case, the SR 4500 is the most compact, reliable, and powerful UHF receiver in its price bracket.The SR 4500 is fully compatible to its predecessor SR 4000. The PT-4500 bodypack transmitter has a rugged rugged aluminium body. The 30 MHz wide UHF band provides up to 1200* selectable frequencies, and several preset frequency banks for various countries help you set up a multichannel system very quickly.A backlit display makes it very easy to tune the PT 4500 to the same frequency as the SR 4500 receiver. A pilot tone system continuously sends transmitter data including MUTE switch position and remaining battery life to the receiver. Integrated charging contacts let you charge the optional BP 4000 battery pack without having to remove it from the transmitter. After only one hour, the battery pack will be fully charged and you can use the transmitter for 12 hours continuously. The 3-pin mini XLR input with adjustable gain accommodates both portable instruments and a variety of AKG microphones for every application.The PT 4500 is fully compatible to its predecessor PT 4000. *The actual number of channels that can be used simultaneously depends on local frequency plans.FeaturesTrue diversity receiver with all-metal case30 MHz wide frequency bandUsing several frequency bands allows up to 70 channelsto be operated simultaneously.Transmitter battery status monitoring and tone code squelchAuto Setup, Environment Scan, and Rehearsal functions for quick and easy setupBacklit, programmable color display and jog wheel with selectable warning signal for ease of useOutput for controlling external devicesIntegrated data interface for controlling and monitoring from a PC viaSystem Architect™SR-4500 Receiver SpecificationsCarrier Frequency Range:
570 to 600 MHz
Modulation: FMAudio Bandwidth: 35 to 20,000 HzTHD: <0.3% typicalSignal/Noise Ratio: >120 dB(A) typicalAudio Outputs: Balanced 3-pin XLR; unbalanced TS 1/4"jack; output level adjustable to -30, 0, +6 dBDimensions: 7.8" x 1.7" x 7.4"Net Weight: 2.2 lbsPatent(s): Remaining playing time (Patent no. AT 408.280, GB 2.349.230, US6.344.730)PT-4500 Transmitter Specifications