Small Guitar Amp with Effect: Jam Buddy is a bluetooth amplifier with speaker. What's even more amazing is that it has a built-in delay effect (Maximum 500ms). It can be plugged into other amps as well to use the pedal's features in venues that require more volume. Portable Combo Guitar Amplifier: Compact and space-saving, built-in rechargeable battery (Charging time is 3-4h, working time is 8-13h… read more