Operation confirmed. There are no problems. The appearance has scratches, small scratches, and dirt. Since this is a used item, please note that returns are not accepted except for initial operational defects. Accessories: Power adapter. Features Clear voice reaches the corners of small and medium-sized halls High-quality sound model that can be used with both AC adapter and batteries In this day and age, where social distancing has become the new normal, it is necessary to keep people apart. However, shouting to be heard in places where people gather or in situations where you want to gather people can lead to droplets and scattering. The Audio-Technica wireless amplifier system solves these problems. It has been used in various situations such as seminars, store promotions, and dance lessons, but it has become a product that is even more in demand in the present era. It employs a 1.9GHz band wireless system with stable communication performance, a diversity antenna that is less prone to communication interruptions, and a digital amplifier circuit with low power consumption and high output. It supports your desire to convey your thoughts with clear sound. Provides clear sound with less interference 1.9GHz band that is less likely to interfere with other wireless devices ・Diversity system that is resistant to communication interruptions Both the speaker and the transmitter are equipped with two antennas each. The antenna with the best reception condition is automatically selected, realizing communication that is less prone to interruptions. ・Howling cancellation that cuts out unnecessary sounds No need for a loud voice, preventing droplets and scattering Clear voice reaches the corners of the event venue The recommended usage range is approximately 450㎡, and the reach is approximately 15-30m*. It is ideal for small meetings and events in small and medium-sized halls that can accommodate 300-400 people. ・Smooth Q&A. Up to 3 people can speak simultaneously Easy, fastest performance Can be used with both AC adapter and batteries ・Top panel that is easy to operate from all directions ・Digital amplifier with low power consumption and high output ・Event content can also be recorded ・Storage box on the rear cover of the main unit Specifications: < Wireless section > Operating frequency 1895.616～1902.528MHz Wireless system 1.9GHz DECT compliant system Frequency characteristics 100～10,000Hz Number of receivers 1 channel Antenna Built-in antenna (diversity) Communication distance Approximately 50m