Feature:1. Equipped with recording jack, the two-way voice signals can be output easily. (such as the bank teller system for recording) Aluminum alloy panel and simple installation make it a great option for communication.2. Qualified speaker and high-sensitive microphone, the voice is realistic and clear.3. Suitable for many occasions like bank, securities, hospital, bus station, etc.4. Volume of speaker and sensitivity of microphone can be adjusted.5. The inside and outside speaker can be turned off individually.6. Both inside and outside have speaker and microphone.Specification:Description:This system has a qualified speaker and high-sensitive microphone. The voice is clear and natural. Suitable for many occasions.Features:Equipped with recording jack, the two-way voice signals can be output easily. (such as the bank teller system for recording)Aluminum alloy panel and simple installation make it a great option for communication.Qualified speaker and high-sensitive microphone, the voice is realistic and clear.Suitable for many occasions like bank, securities, hospital, bus station, etc.Volume of speaker and sensitivity of microphone can be adjusted.The inside and outside speaker can be turned off individually.Both inside and outside have speaker and microphone.Specification:Brand: RetekessMaterial: Aluminum AlloyConnection Cable Length: 2m / 6.5ftWorking Voltage: DC 9V / 300mAAdapter: AC 110V or AC 220V, 50/60HzMain Sound (sub sound): 2W+2WMicrophone Sensitivity: -48db 20Hz-16kHzSize: 150 * 100 * 50mm / 70 * 20mmWeight: 350g / 0.77lbPackage Includes:1 * Dual-way Intercom Mic1 * Speaker1 * Power adapter1 * English manualPackage List:1 * Dual-way Intercom Mic1 * Speaker1 * Power adapter1 * English manual