1. 10 kinds of sound change modes, 8 kinds of interesting sound effects.2. Fine tuning, more realistic sound.3. There is Bluetooth accompaniment input.4. The tone is clear and noiseless, and supports and systems.5. Small size, easy to carry, very easy to carry or store. Easy to use, no drivers need to be installed.Audio Interface: 3.5mmCharging Interface: USB-Battery Capacity: 500mAh/3.7vProduct Size: 135x 51x 12mmColour:blackMaterial:ABSPackage Contents:1 x Universal Sound ChangerOnly the above package content, other products are not included.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.