Guitar Tone Completer Sound Opener Simulates the Vibration of Actual Playing Guitar Reache Full Sound Potential HK-01 The tone completer has the guitar world buzzing!_x000D_ Simulates the effects of actual playing to bring out the best in your guitar._x000D_ This revolutionary "play-in" simulator is based on the observation that the more an acoustic instrument is played, the faster it reaches its full sound potential (its "play-in" period)._x000D_ The tone completer applies direct vibration to a guitar at controlled frequencies, to simulate the effects of actual playing. Many players report increased volume and dynamic range in their instruments after using the device between playing sessions._x000D_ _x000D_ Built-in battery: 800 mA_x000D_ Application: Guitar/Ukulele_x000D_ Colour: black_x000D_ Material: ABS_x000D_ Size: 7.5 x 5.5 x 5cm_x000D_ _x000D_ Package Contents:_x000D_ 1 x Sound Opener_x000D_ 1 x connection line_x000D_ Note: Do not use while charging_x000D_ _x000D_ Only the above package content, other products are not included._x000D_ Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm. _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_