Euclidean circular interpolation A box of 16 units with dimensions of 43 * 37 * 38cm and 14kg The system has highquality speakers and highly sensitive microphones. Especially with the use of 4core highstrength aluminum foil shielded wire, it has strong antiinterference ability, making the sound clear and natural. The twoway voice intercom communication technology can automatically recognize the voice signals during the call process without any operation. Suitable for banks, securities companies, hospitals, stations, etc. that install antitheft glass. Features: 1. Adopting aluminum alloy panel, easy installation, simple DIY operation and connection 3. There are speakers and microphones both inside and outside, and the volume and microphone sensitivity can be adjusted separately 4. The internal and external speakers can be turned off separately 5. The speaker volume and microphone sensitivity can be adjusted 6. The internal and external speakers can be turned off separately 7. Use 4core highstrength aluminum foil shielded wire and secure connection plug 9. Equipped with a recording jack, it can output both internal and external twoway voice signals (such as recording in bank teller systems) 10. Can be used in any difficult to communicate place, such as banks, securities, hospitals, bus stations, etc Specifications: 1. Material: Aluminum alloy panel 2. Connection cable length: 2m 3. Working voltage: DC9V/300mA 4. Adapter: AC 110V/220V 50/60Hz 5. Main voice (secondary voice): 2W+2W 6. Microphone sensitivity: -48db 20Hz-16KHz 7. External dimensions: 150 x 100 x 50mm/70 x 20mm 8. Host weight: 350g