Guitar wah pedal Wah. Pedal offers a traditional wah-wah sound in durable metal design with LED that indicates power on. Wah pedal operates in three fully adjustable modes: vintage, autowah, step wah. Wah pedal is true bypass and provides storage for up to four sound settings. Tap Tempo function can be used with an external pedal. Effect pedal is TrueBypass and it is powered by a 9V battery or adapter, which is not included in the package.