[. . . ] However, there is no guarantee that interference will not occur in a particular installation. If this equipment does cause harmful interference to radio or television reception, which can be determined by turning the equipment off and on, the user is encouraged to try to correct the interference by one or more of the following measures: · Connect the equipment into an outlet on a circuit different from that to which the receiver is connected. Shielded cables and I/O cords must be used for this equipment to comply with the relevant FCC regulations. [. . . ] Operating in the 660 MHz to 865 MHz UHF range, the GB 40 FLEXX provides three selectable, quartz stabilized carrier frequencies within the 3-MHz-wide frequency band you specified at the time of ordering and uses a permanently attached flexible antenna. You can replace the black battery cover with one of the supplied replacement covers. M: The signal delivered by the microphone is muted while power and the RF carrier frequency remain on. This prevents the receiver responding to interference from other transmitters. We recommend replacing the battery with a new one as soon as possible. 6 Flexible antenna 7 This slide switch tunes the transmitter to one of three different carrier frequencies within the transmitter's carrier frequency band. 8 Carrier frequency label: The label on the transmitter rear panel indicates the name of the carrier frequency band and the three carrier frequencies of your transmitter. Pull the battery compartment lid (1) down to remove it from the transmitter. If you do, the battery will not be held in place properly and may cause a rattling noise. If there is a dead or defective battery inside the battery compartment, remove the battery. Insert the supplied or new battery (2) into the battery compartment as shown in fig. As long as the battery is in good condition, the status LED (4) will flash red momentarily and will then be lit green constantly. If the status LED (4) lights red constantly the battery will be dead within about 60 minutes. Slide the battery compartment lid (1) onto the transmitter against the direction of the arrow to the point that the lid (1) will click shut. 2 Using Rechargeable Batteries) Instead of dry batteries, you can also use a 1. Note: If you use a rechargeable battery, the LED will switch to red 15 to 20 minutes before the battery will be dead! [. . . ] Screw the adapter plug (3) onto the threaded plug (4) on the transmitter (2) CW. Use the supplied Velcro pads to make the transmitter sit more securely on your instrument: 1. Remove the backing from the other pad and attach it to the instrument. [. . . ]