Mooer Leveline Volume Pedal
A volume pedal is essential for a live show of bands. It can not only adjust volume conveniently, but also create special effects, like a violin without sound head, or like a tremolo effect with sounds randomly loud or low.
Most traditional pedals have so big dimension that is not portable, and they also requests for pickups and certain location in a pedal chain.
Based above, Mooer Leveline is highly recommended.