DOD Envelope Filter 440 This is an effects pedal for electric guitar. - Model Name: Envelope Filter 440 - Color: Green - Brand: DOD - Function: Envelope Filter - Control Knobs: 2 knobs (VOICE, OUT) - Accessories: Instruction manual, sticker (applied), box It is sold on Amazon for 20,000 yen. I purchased it in Singapore. I have only checked it at home and have not used it outside. Thank you for looking.