Guitar tone completer for enhanced sound simulation and vibration The tone completer has the guitar world buzzing!<br> Simulates the effects of actual playing to bring out the best in your guitar.<br> 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).<br> The tone completer applies direct vibration to a guitar at controlled frequencies, to the effects of actual playing. Many players report increased volume and dynamic range in their instruments after using the device between playing sessions.<br> Built-in battery: 800 mA<br> Application: Guitar/Ukulele<br> Colour: black<br> Material: ABS<br> Size: 7.5 x 5.5 x 5cm<br> Package Contents:<br> 1 x Sound Opener<br> 1 x connection line<br> Note: Do not use while charging<br> Only the above package content, other products are not included.<br> Note: Light 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.