Built-in 4 Effects: This portable guitar amp is suitable for electric guitar, and has 4 effects, clean, distortion, overdrive, reverb, which cater to your need of daily practice Compact and Portable: This mini guitar amp is a cool partner when traveling or practicing, On-the-go, tiny size, easy to throw into your backpack or luggage, Small as it is, it has adequate volume for practice with 5w speaker Plug and Play: The amp has a 6.35mm plug, so it not bother you to deal with cords and gives you more mobility, The design makes it easy to hang up on the guitar, Just plug and play. You can practice at any time and anywhere Bluetooth Function: The mini electric amp has a Bluetooth Audio Function that allows this amp to from your phone or other Bluetooth devices when connected, So you can play the guitar to the accompaniment of music; Kind reminder: this does to Bluetooth headphones or Bluetooth speakers Rechargeable Amplifier: It can be used for about 6 hours after being fully ; The chargeable feature helps free you from the trouble of buying the battery needed and finding the power supply when playing outdoors; We suggest that you use a 5V 2A charger. Please don't use chargers with a Voltage 5V, as they damage the product or cause other serious consequences (Due to different product batches, the appearance , which does not affect the use) Colour:Black Material:ABS Package Contents: 1 x mini Electeic Guitar Amp 1 x USB Charging Cable 1 x English instructions Only the above package content, other products are not included. Note: Light reflection 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.