Rowin LEF-327 Trelicopter Optical Tremolo Pedal True Bypass Mini Metal Guitar Volume Modulation Effect

Product OverviewRowin LEF-327 Trelicopter is a compact pure analog optical LDR tremolo pedal, replicating warm vintage tube amp optical tremolo tone, smooth natural volume pulse without harsh digital artifacts. Optical circuit uses light-dependent resistor to generate organic breathing amplitude modulation, core tone for surf rock, country, jazz, indie and ambient music, compatible with electric guitar & bass.Three independent control knobs deliver full tremolo tone shaping:SPEED: Adjust pulse frequency, slow cinematic swell (0.2Hz) to fast flicker (8Hz)DEPTH: Control modulation intensity, subtle gentle pulse to full 100% volume swingBIAS: Tune optical circuit waveform, shift from smooth rounded sine wave to sharp choppy square wave for diverse tremolo colorBright green die-cast zinc alloy ultra-mini chassis occupies minimal space on compact pedalboards, ideal for bedroom practice, studio vintage modulation recording and portable live gigs. Adopts full hardwire true bypass circuit, fully retains raw uncolored instrument clean tone with zero signal loss, frequency roll-off when tremolo disabled.Core Key FeaturesPure Optical LDR Analog Tremolo CircuitClassic vintage amp optical tremolo texture, soft organic breathing pulse, zero harsh digital aliasing, highly dynamic response to picking touch.Triple Independent Tone Shaping KnobsSPEED: Tremolo pulse speed, wide range from slow ballad swell to fast surf flickerDEPTH: Modulation depth, control how much volume fluctuates per cycleBIAS: Waveform shaping, smooth round pulse / tight choppy staccato tremoloFull 3PDT Hardwire True BypassUnbroken direct instrument signal path, zero background hum, no low-frequency attenuation when pedal offClear White LED Working IndicatorVisible under dim stage lighting to confirm tremolo active stateShockproof Bright Green Die-Cast Zinc Alloy HousingPalm-sized tiny footprint, scratch-resistant smooth green metal shell, anti-slip rubber bottom pad for stable pedalboard placementUltra Low Stable Power ConsumptionOnly 5mA working current, fully compatible with standard 9V center-negative daisy-chain power adaptersReverbFull Technical SpecificationsModel: LEF-327 Trelicopter Optical Analog TremoloBrand: RowinEffect Type: Mini Vintage Optical Volume Tremolo StompboxControls: SPEED Speed Knob, DEPTH Depth Knob, BIAS Waveform KnobInput Jack: 1/4” mono audio jack, Input Impedance: 1M OhmsOutput Jack: 1/4” mono audio jack, Output Impedance: 1M OhmsWorking Current: 5mAPower Supply: DC 9V barrel adapter (center pin negative, outer barrel positive, adapter NOT included; battery power unsupported)Material: Die-Cast Zinc Alloy Metal ChassisDimensions: 95mm(D) × 45mm(W) × 53mm(H)Net Weight: 278g, Gross Weight (with gift box): 310gColor: Bright GreenOEM/ODM Support: AvailableOperation InstructionsINPUT Jack: Connect your guitar/bass or output of another effect pedal with 6.3mm audio cableOUTPUT Jack: Connect to your guitar/bass amplifier or INPUT jack of another effect pedal via 6.3mm audio cableSPEED Knob: Clockwise = faster pulse flicker; Counter-clockwise = slow cinematic breathing swellDEPTH Knob: Clockwise = deeper full volume swing; Counter-clockwise = subtle gentle mild pulseBIAS Knob: Counter-clockwise = smooth rounded sine wave tremolo; Clockwise = tight sharp choppy square wave staccatoTrue Bypass Footswitch: Step down the footswitch to toggle tremolo ON / bypass OFF stateLED Indicator: Lights white when the optical tremolo effect is activatedPower Jack: Plug in DC 9V center-negative power adapter to supply power for the pedal1. Manufacturer & Business Entity InfoBrand Name: RowinManufacturer Factory: Rowin Audio Equipment Factory, Dongguan City, Guangdong Province, ChinaUS Selling Entity: Sole Proprietor Local Warehouse Operator (Irvine, California)Main Products: 300 series mini optical tremolo/swell/fuzz/overdrive/EQ/booster/distortion/noise gate pedals, ABY signal switchers, DI Boxes, LEF series multi-effect stompboxes, LFS looper & control footswitchesService Support: Retail sales, small bulk wholesale, OEM private custom logo service for global music instrument retailers worldwide2. Global Safety Compliance CertificationsFCC VOC (North American US Market): Compliant with US electromagnetic interference standards for audio electronic devicesCE Certification (EU & UK): EMC Electromagnetic Compatibility + LVD Low Voltage Safety CertificationRoHS Compliance: Restricts hazardous heavy metals inside circuit boards & metal housings3. Product Safety PrecautionsPower SafetyOnly use regulated DC 9V center-negative power adapter with minimum 500mA output. Mismatched voltage or reversed polarity will permanently damage internal analog circuit boards. Unplug power supply when unused or during thunderstorms to avoid surge voltage damage. This pedal DOES NOT support battery power supply.Mechanical Operation SafetyDo not apply heavy force to footswitch, three control knobs and 1/4” audio jacks to prevent internal hardware failure. Unauthorized disassembly of the zinc alloy housing will void the 6-month limited warranty for pre-owned 95% like-new inventory.Cleaning & Storage RulesClean metal housing only with dry soft cloth; alcohol, chemical solvents, detergent or abrasive cleaners are strictly forbidden. Store pedals in cool dry indoor space, avoid long-term direct sunlight, high humidity, violent vibration and heavy physical impact.Usage Environment WarningDo not operate this tremolo pedal near water, rainy outdoor environments or high-power magnetic equipment to prevent audio signal distortion and short circuit risk.