A box contains 20 units, net and gross weight is 14.64/15.84kg, and the box dimensions are 52*42*39cm.

Suitable for any windows that need anti-theft, damage protection, and communication difficulties, such as banks, securities, post offices, train stations, cashier counters, ticket offices, and hospitals.

Characteristics:
1. Full-duplex voice intercom technology, automatic voice signal recognition and processing, no operation required during the call.
2. Special anti-feedback chips with automatic noise reduction feature to reduce feedback.
3. The fully automatic call control technology integrates upgraded speakers and microphones. It is connected to the main unit and is easy to install.
4. Experience in applying electroacoustic technology, with well-designed electroacoustic equipment, output power can reach 3W, with clear sound and high voice recognition rate.
5. The host design has internal and external silent switches, which can be used as needed.
6. It can output both internal and external voice signals simultaneously. Use the stereo jack output mode. Moreover, the recording function is not controlled by the power switch and function buttons.
7. The auxiliary machine is hung on the wall or pasted on the glass.
8. Beautiful and smooth plastic material.

Specification:
1. Working Voltage: DC12V
Maximum Operating Current: 1A
3. Main and Subwoofer: 3W
4. External Microphone: -38dB ±3dB
5. Built-in microphone: -38dB ±3dB
6. Size: Main unit 18.2 * 13 * 5.6CM, Sub unit 6.1 * 8.5 * 2.4CM