Spark Reverb (ME SRV 1) Reverb pedal with 2 great soundingreverb modes:Room/SpringROOM: Authentic decay and warmthSPRING: Simulates a classic '60s surf-style spring reverb Controls: Level, Colour, DecayBacklit control panels and controlsTrue BypassInput 1/4" mono jack, Output 1/4" mono jackMetal housing, special tough surface finishHigh-quality metal footswitchPower: optional 9V DC power supply, polarity center minus (e.g. Mooer Micro Power MPW 1, or Rockpower NT 1)Dimensions (DxWxH): approx. 62 x 60 x 53 mmWeight: approx. 260 gIncl. velcro tapeThe SPARK Series mini effects pedals featurea compact size and attractive lighting design. Further, the full metal case, and the special surface treating technology, making it having a long durability.Surface LED lighting is easy to see on dark stages."For players who want Mooer" - MOOER is an energetic and technological innovative company, dedicated in researching, manufacturing and marketing electronic musical instruments and audio equipments, by applying the state-of-the-art technology into their products. They have developed a variety of products in electronic musical instruments, ranging from Synthesizer, sound and audio processor, and digital audio effects etc., relying on their strong and efficient research and development team, most of them have deep accomplishment in the area of music and musical instruments and have many years of accumulation in synthesizer technology, wavetable synthesizer technology and digital audio effects technology.