Clone of the EHX Bassballs...sounds pretty much exactly the same as far as I can tell. Not using it currently. Small, inexpensive, works well. What's not to love? From Mooer: The Mooer Sweeper Dynamic Envelope Filter works for either bass or guitar and puts a new spin on your sound. The simple controls and compact size make it a great addition to your pedal board. Its full metal casing makes it durable and road ready, and like most great effects pedals it has true bypass. Features Dynamic envelope filter pedal for both bass and guitar Unique Funky style filter tone, Clean and Fuzz sweeping switch Full metal shell Pedalboard friendly True bypass Specifications Working Modes: 2(Clean/Fuzz) Input: 1/4" monaural jack (impedance: 220k Ohms) Output: 1/4" monaural jack (impedance: 1.4k Ohms) Power Requirements: AC adapter 9V DC (center minus plug) Current Draw: 7 mA Dimensions: 1.6535" (W) x 2.0472" (H) x 3.6811" (D) Weight: 0.36lb