Rowin Trelicopter is a Classic optical tremolo with huge range of speeds and depths BIAS knob brings various color of the tremolo effect soundFeatures and Specifications Rowin micro effect pedals pack an incredibly BIG sound into a very small package.
Very small and exquisite

Demo by Ryan Lutton 

Demo by DutchGuitarDude

LEF-327 Trelicopter

Demo by 1959 Guitars

Demo by harrychomusic

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LEF-326 Slow Hand

They might not be considered the stars of the show, but line selectors and channel switchers are definitely among the most essential workhorses of a good pedalboard. The LEF-330 ABY selector from budget guitar effects pedal maker Rowin is a versatile selector pedal, letting your signal flow from A or B to Y or vice versa. You can connect two instruments—an electric and an acoustic guitar, for example—to one amp or use the LEF-330 ABY to throw your instrument’s signal to two separate amps for a true stereo attack.

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ABY Channel Switch

Wide range frequency response blues style overdrive sound, also sounds good on bass

2 Working Modes: Bright/Fat

Metal shell

Demo by  DutchGuitarDude

Demo by  Hubtone.com.au

LEF-321 Bluesy

High gain dist pedal with excellent dynamic response and definition, especially suitable for solo playing

Classic R&R: The most classic rock distortion, let you dream back to the most classic era!

Demo by  サウンドハウス

Demo by Greg Talks Guitars