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.Description: This KQ-1A pick-up will work with acoustic and classical guitars This pickup system will fit steel string and nylon string acoustic guitar Also work with most tuners that have a jack input of 6.3mm A quick and easy way to amplify your guitar"s sound No drilling hole required, easy to install Clip the left side and tight up the right side by wrench Soft rubber padding is good for protecting your guitar Please kindly be aware the amplifier/speaker/tuner is not included Jack: 6.3mm Cable length: 2.9m (9.5ft)Package Includes: 1 x acoustic classical guitar amplifier soundhole pickup