Specifications: Power supply: AC/DC 9V Board size: 80mmx 50mm Remote controller Length: 88mm Potentiometer handle length: 20mm Features: 100% brand new and high quality. Audio amplifier volume control board microprocessor Potentiometers ALPS potentiometer, durable. With remote indication status. With remote control switch machine function. (Not include relay) Each boot automatically transferred to the smallest sound and automatically transferred to the 9 o'clock position, very intelligent, so it can ensure not appear every time you turn a great voice. Package Included: 1 x AC/DC 9V Volume control board 1 x Remote controller（battery is not included）.
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