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ESCOL ES-21 Electronic Hobby Kit Telephone Amplifier PENGUAT TELEFON

By A Mystery Man Writer

Description
ESCOL self assemble hobby kit. ~ For students and hobbyists who have the basic soldering skills and knowledge in electronics. Features: • This kit connects directly to telephone lines. (no humming problem like the circuits that use pick-up coils) • It amplifies telephone conversation via a dynamic speaker. • An active low-pass filter is included to process voice signal so that the sound produced by the speaker is loud & clear • Comes with volume control. • Knob not included.
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from per adult (price varies by group size)