Audio-Technica (800MHz B-band UHF) Wireless System ATW-3110 (atw-r3100j, atw-t310j) Operation confirmed. There are no problems. The exterior has scratches and dirt. Accessories include the following set contents (as listed). Since this is a used item, returns are not accepted except for initial operational defects. ■ Wireless Set Contents 【System Configuration】 ・ ATW-T310J (Beltpack Transmitter) ・ ATW-R3100J Receiver ・ Tie-clip wireless microphone (paint peeling) ・ AC adapter x 1 ・ Cables x 1 each ・ Antennas x 2 ・ Outer box ・ Instruction manual ・ Rack mount brackets Specifications Reference ＜ATW-T310J Beltpack Transmitter＞ ■ Radio wave type: F9W ■ Transmission frequency: B-band (806.125～809.750MHz, 30 channels) ■ Range: Lo 30m / Hi 60m (reference value) ■ Transmission output: Hi 10mW / Lo 2mW ■ Tone signal: 31.25kHz ■ Antenna type: 1/4 whip antenna ■ Maximum allowable input: MIC -2dB (ATT. -6dB) / INST +12dB (ATT. -6dB) ■ Frequency response: 70～15,000Hz ■ Condenser microphone supply power: 5V ■ Power supply: AA batteries x 2 ■ Operating time: Approx. 6 hours (alkaline batteries, RF/Hi) / Approx. 8 hours (alkaline batteries, RF/LOW) ■ Dimensions and weight (excluding batteries): Approx. H174 x W66 x D24 mm, 81g ＜ATW-R3100J Receiver＞ ■ Radio wave type: F9W ■ Receiving frequency: B-band (806.125～809.750MHz, 30 channels) ■ Receiving circuit system: Space diversity, double superheterodyne ■ Receiving sensitivity: 24dBuV ■ Antenna input terminal: BNC type (50Ω) ■ ANT POWER supply voltage: DC10～12V, 60mA Max (each ANT input terminal) ■ Overall frequency response: 70～15,000Hz ■ Dynamic range: 110dB (60dBμV input, 1kHz, frequency deviation ±35kHz) ■ Total harmonic distortion: 1% or less ■ Audio output terminals: Balanced (XLR3 pin, male), unbalanced (6.3φ phone jack) ■ Audio output level: Balanced -24dB, Unbalanced -26dB