characteristic:

1. The host features a high gloss streamlined design and is equipped with an eccentric aluminum alloy extension unit. It is compact in size and aesthetically pleasing, with only one connecting wire inside and outside, making installation simple.
2. The host and payment machine do not have microphones, so there is no need for an external microphone for fully automatic hands-free communication with the extension in both directions.
3. Using high-quality speakers, the system produces realistic and clear sound, and the volume inside and outside can be adjusted separately.
4. Microcomputer processing circuit with mute function and unique channel interlock circuit, completely solving the problems of echo and whistling.
5. Equipped with a recording jack, it can output both internal and external audio signals.
6. Can be used in any window where conversation is difficult. This model is suitable for internal intercoms in banks, ticket offices, factories, and other places.

Technical parameters:

Working voltage: AC220V to DC 12V

Output power: 3W+2W 100Hz-15KHz

Maximum working current: 500mA

Microphone: -42db ± 0.5db 20Hz-16KHz

Host dimensions: 112mm * 68mm * 60mm

External dimensions of the extension: diameter 6.3cm * 1.8cm