The WL-T Wireless Transmitter is compatible with WL-series wireless systems and the Katana-Air wireless guitar amp, providing a spare to use if your original transmitter is lost or damaged. When pre-charged, it also functions as a backup transmitter for live performances. To charge the WL-T s built-in battery and establish a connection to your BOSS wireless receiver, simply follow the same procedures used with the original transmitter included with your system. Features: Compatible with WL series and Katana-Air Battery Charges in as little as 3 hours 1/4" TRS Connector Solid Construction Small and easily portable Get your Boss WL-T  Wireless Transmitter today at the guaranteed lowest price from Sam Ash with our 45-day return and 60-day price protection policy.