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Audio Technica PRO 128 Unipak Wireless Microphone System, Professional systems deliver wired sound with the freedom of wireless technology, Designed for ease-of-use, Consists of the Pro R1 Receiver and the ATW-128 Microphone, ATW-128 requires 9V Battery (not included) for approximately 15 hours use, R1 includes AC adapter.

Additional Information:

Overall System

• Operating Frequency VHF band, 169 MHz to 207 MHz
• Frequency Stability ±0.005%
• Modulation Mode FM
• Maximum Deviation ±15 kHz
• Operating Range 200' minimum
• Operating Temperature Range 40° F (4° C) to 110° F (43° C)
• Frequency Response 100 Hz to 15 kHz

PRO-R1 Receiver

• Receiving System Non-diversity single-channel dual antenna system
• Image Rejection 50 dB minimum
• Signal-to-noise Ratio 87 dB at 10 kHz deviation (IEC-weighted), maximum modulation 15 kHz
• Total Harmonic Distortion <=1% (10 kHz deviation at 1 kHz)
• Sensitivity 10 µV for 60 dB S/N (IEC-weighted)
• Audio Output 350 mV (1 kHz modulation, 10 kHz deviation, 1M ohm load)
• Output Connector 1/4" phone jack
• Power Supply 12V DC, 300 mA, with AC adapter
• Dimensions 4.33" (110.0 mm) W x 1.38" (35.1 mm) H x 8.27" (210.1 mm) D
• Net Weight 10.2 oz (289 grams)

ATW-T28 Handheld Transmitter

• RF Power Output 50 mW Max
• Spurious Emissions Under federal regulations
• Dynamic Range >=90 dB
• Microphone Element Dynamic unidirectional
• Battery (not included) 9V (NEDA type 1604) alkaline
• Current Consumption 30 mA typical
• Battery Life Approximately 15 hours in High position, approximately 20 hours in Low position
• Dimensions 9.50" (241.3 mm) long, 2.10" (53.3 mm) diameter
• Net Weight (without battery) 12.7 oz (360 grams)