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For electret microphones Volume control with on/off function Internal power supply via 1.5 V battery AAA size 3.5 mm jack as input 4 metre connection cable with 3.5 mm plug as output
For electret microphones Volume control with on/off function Internal power supply via 1.5 V battery AAA size 3.5 mm jack as input 4 metre connection cable with 3.5 mm plug as output