Rowin WS-10-II SKY PLUG Digital Guitar/ Bass /Powered Speaker/Wireless System Rechargeable via USB The Rowin WS-10 Sky Plug can be used for Guitars Bass Keyboards etc etc it can also be used to send signal to powered monitors, powered speakers and with its special functions one sender to many receivers can send signal to many enclosures making it perfect for DJ's Karaoke hosts and many club installations saving on expensive lengths of signal or speaker wire. Digital Wireless Transmitter Receiver Wireless Digital Transmitter & Receiver ROWIN WS-10 48K 2.4Ghz Features: Lightweight Compact Design Extremely Responsive 2.4Ghz Digital Pick Up & Transfer Easy Set Up, No Manual Tuning or Programing Required High-quality voice, all digitals, 2.4G Audio Transmission distance is 20 to 30 meters, while 50 meters outside the room. Unlike Analog Audio, it will not be influenced by external signals or phones. Signal to Noise and Distortion > 87dB Support "One-to-Many".(one to one, one to many amplifiers) Near zero latency time, no signal interference, 60 feet or more of signal distance makes this the perfect choice for any musician looking for a cable free setup. Extremely quiet and superb sound offers almost NO coloration of signal and a great price point makes the Rowin-WS-10 a perfect choice. Powered by Lithium Ion Battery included.Battery life is about 9 hours continuous. Features High quality sound, all digital 48K, 2.4G frequency transfer Transmission distance is 20 to 30 meters (about 60 feet) Channel switching options reduce interference from external signals or phones Signal to noise more than 87 dB Supports one-to-many, one-to-one amplifiers Easy to use, plug and play Universal for all electric musical instruments Receiver size: 12 x 4 x 2.5cm Transmitter size: 9.5 x 5 x 2.5cm No Duty to Canada and USAFree USA ShippingShips from Canada This is what we found after jamming with the unit for a few hours Almost NO coloration of sound , the signal remained crisp and true to the guitars actual sound, the WS-10 Sky Plug was extremely quiet best we've heard in a while for under $200 and fast no latency, it was easy to use just push the button and it found the receiver quick and locked in and stayed with NO problem what so ever.We also turned the transmitter OFF and ON and the Receiver again OFF and ON while the amp was ON and found minimal pop and excellent Squelch.We also compared it to JOYO and found that the Rowin is much quieter and sonic ally overall a better choice. Both have rechargeable Lithium ion Battery.