Estone New High Quality Classical Acoustic Guitar Amplifier Soundhole Pickup This is an acoustic classical guitar amplifier soundhole pickup, a must have for all acoustic guitarists! Pick up the sound from guitar string vibration and then transfer the sound directly into your existing tuner / amplifier / speaker at a good signal. The pick-up clips onto the edge of the sound hole of your guitar and is essential for tuning up in noisy surroundings This pick-up will work with acoustic and classical guitars Also work with most tuners that have a jack input of 6.3mm A quick and easy way to amplify your guitar's sound Soft rubber padding is good for protecting your guitar