ZDL-9908 Window Two-way Walkie-talkie 1. Power input: AC100-240V 50/60Hz 2. Working voltage: DC12V 3. Working current: 1A (MAX) 4. Main sound (sub sound): 3W 5. Built-in microphone: 38db+/-3db 6. External microphone: 38db+/-3db 7. Frequency response: 100Hz-12KHz 8. Dimensions: 157 x 87 x 46mm 9. Audio length: 2 meters 10. Power cord length: 1.2 metersfeature: 1. Anti-interference, no noise function. 2. Two-way voice intercom communication technology, automatic recognition and processing of voice signals during the call, without any . 3. Dedicated anti-sidetone processing chip with automatic mute function. 4. The application of fully automatic call control, the microphone and speaker of the external unit are designed in an manner, which is connected to the front line system of the main unit, and is easy to install. 5. Internal and external two-way voice signal output (bank tler recording), stereo jack output mode can prevent the recording function controlled by the power switch and function button. 6. Application: Banks, securities, hospitals, bus stations and other places where anti-theft gl is installed.