– Active channel pick up system for Acoustic Guitar/Ukulele – Undersaddle Piezo active pick up – Chorus, Reverb and Delay effects – Small Internal TRANS speaker to mount inside your guitar/ukulele. – Rechargeable 2600mAh 3.7V Li-ion battery – Soundhole mounted design – 4 to 5 hours to full charge – 30 hours usage when connected to amplifier – 10 hours usage standalone