Mini Preamplifier Preamp 6.35mm Plug with Bass Treble EQ Volume Control for Acoustic Guitar Features: Mini preamplifier with impedance matching function for acoustic guitars. Supports 2-band EQ(BASS andamp TREBLE) and volume adjusting. 6.35mm plug for connecting musical instrument and 6.35mm output jack for connecting guitar amplifier. It can also turn your home stereo into a guitar amplifier, allowing you to experience the pleasure of music performing. ABS material and compact size, durable and lightweight, convenient to carry around. Specifications: Material: ABS Power Supply: 1 x 3V CR2032 battery(not included) Item Size: 9.5 x 4.5 x 2.5cm / 3.7 x 1.8 x 1in Item Weight: 33g / 1.2oz Package Size: 14 x 10.5 x 4cm / 5.5 x 4.1 x 1.6in Package Weight: 53g / 1.9oz Note: The guitar showed in the picture is not included. Package List: 1 x Preamplifier Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Sold by-Minnanxin