1This mini pre& 8209;stage DI has impedance matching function, high and low EQ adjustment, so that the passive pickup instantly becomes an active pickup, continuously outputting more power. 2This pickup can also turn your home speaker into a guitar speaker, allowing you to experience the carnival of music performance at will. It also supports 2& 8209;band equalizer bass and treble. 3This product has an electric guitar amplifier with a real analog circuit, which truly simulates the response of the original amplifier. 4This product is a 6.35mm plug for connecting musical instruments and a 6.35mm output jack for connecting a guitar amplifier. 5This pickup is made of metal and ABS, which is strong and durable, small in size, light in weight and easy to carry. Item Type: Pickup Power Amplifier Material: ABS and Metal Battery: CR2032 button battery (not included) 1 xPickup Power Amplifier