EV-1-WL: Does this unit work via USB bus power? August 05, 2021 07:43 Updated Follow No, the EV-1-WL does not support USB bus power. Use alkaline batteries (AA × 2) or an AC adaptor (BOSS PSA Series). Related articles EV-1-WL: Can I connect this unit to my computer? EV-1-WL: Why won’t the unit connect via Bluetooth? EV-1-WL: Compatibility EV-1-WL: Can I connect this unit to the EXP IN jack? EV-1-WL: Can this unit output MIDI PC (program change) numbers?