Description The easiest introduction to the world of wireless systems, WL-20 consists of a bug style transmitter and corresponding receiver, with a nominal operating range of 15m. It’s very much plug and play – to pair, simply plug the two together, wait for the yellow light to stop flashing, and you’re ready to go. The unit’s auto-pairing feature automatically chooses the optimum frequency to operate on in any given room out of the 14 possible channels. WL-20 also features built-in cable tone emulation, which reproduces the tone of using a 10 foot guitar cable. To charge the internal rechargeable batteries, once again it’s as easy as plugging the transmitter and receiver together and connecting a USB cable to charge both at the same time. 4 hours charging time will give you 12 hours of battery life for the transmitter, and 10 hours for the receiver. A useful thing to note is that when storing the wireless system for long periods, it’s best not to connect the transmitter and receiver. Once the automatic pairing function is complete, the system goes into a standby mode where the LED flashes once every few seconds. This does consume a small amount of battery and will eventually run down the charge.