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SPON Digital Window Intercom DWT-6507A/B with Physical Button: intercom. • Recognizing sound source, control environment noise, automatically adjust volume and restore the original sound. • Providing three mode scene(quiet, standard, noisy), support one-key ...

SPON Full Duplex IP Window Intercom Kits DWT-6502A/B: window intercom, without time limitation of pressing button. 3. To identify the sound source, at the same time, suppress environment noise, with function of automatic volume adjustment and restoring ...

SPON Durable Window Intercom Kits DWT-6505A/B: light on. • Recognizing sound source, control environment noise, automatically adjust volume and restore the original sound. • Providing three mode scene(quiet, standard, noisy), support one-key ...

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SPON Digital Window Intercom DWT-6507A/B with Physical Button