[. . . ] 2 V AAA size Ni-MH Transmitter: TR 120 with audio connecting cable (permanently connected) Mains unit: NT-RS 100 Adapter: 3. Additional headphones: HDR 120 Replacement ear cushions Only use original Sennheiser components, otherwise the unit can be damaged and the warranty becomes null and void. [. . . ] These limits are designed to provide reasonable protection against harmful interference in a residential installation. This equipment generates, uses and can radiate radio frequency energy and, if not installed and used in accordance with the instructions, may cause harmful interference to radio communications. 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: 1) Reorient or relocate the receiving antenna. 3) Connect the equipment into an outlet on a circuit different from that to which the receiver is connected. 4) Consult the dealer or an experienced radio/TV technician for help. Warning: Changes or modifications made to this equipment not expressly approved by Sennheiser electronic Corp. Il trasmettitore è predisposto per il The transmitter is prepared for wall L'émetteur est prévu pour être montaggio a parete. The ear cushions are secured to the earcups by means of a quarter turn fastener. To remove an ear cushion, turn it in the direction of the arrow until you overcome a slight resistance and lift it off the earcup. Attention: Only use rechargeable batteries, never use standard batteries!The red LED lights up, indicating that the batteries are being charged. [. . . ] Televisions) can cause interference to your wireless headphone system. If this happens, increase the distance between the transmitter and the interference source. [. . . ]