The Amumu SBT-10 Acoustic Guitar Pickup is a passive transducer system for acoustic instruments. Volume and tone are adjustable, so you can do some adjustments without the need for the amplifier. This is passive and does not require batteries. Simply use the included double-sided adhesive to the pickup and attach to your musical instrument and use the included musical instrument cable to connect the pickup and amplifier to quickly get natural, full sound from the amplifier. Recommended for entry users and light users who have never installed pickups once, and those looking for easy pickups in small concerts such as cafes and classroom presentations. Package includes pickup x 1, double sided tape x 2, cable holder x 2, 9.8 ft (3 m) instrument cable x 1, user manual x 1