Instead of the included earbud, you can use your own ear/headphones with a 3.5mm jack. Optical connection: the additional wireless headphones have an optical connection (Toslink), which transmits sound without interference and in good quality. If you want to use headphones parallel to your TV speakers, you can use the optical audio output of your TV. Your family can also hear the sound of the TV. Very loud adjustable wireless headphones: finally enjoy movies and music again! This is possible with the addition TV headphones CL 7350 OPTICLIP from Geemarc. The sounds of TVs or other audio systems are transmitted to the headphones using wireless signals. The volume of the headphones is adjustable up to a maximum of 125 dB. The included external microphone amplifies voice and sound in the room if required. Thanks to the headphones, hearing impaired people can finally watch TV again without disturbing family and neighbours by loud TV. High and low tone control: especially hearing impaired people can often hardly perceive sounds in certain frequency ranges. For this reason, the TV headphones can be used to control high and low sound. This allows you to optimally adjust the sound of the headphones to your needs. The setting is very fast, set directly on the chin bar via a button. Easy to use: the additional wireless headphones CL 7350 OPTICLIP consists of a transmitter and a stereo chin bar phone. The transmitter is simply connected to the TV using the included cables (either on the scart or headphone jack). The chin bar is wireless and the sound is transmitted via radio. As soon as you put on the headphones, the addition CL 7350 OPTICLIP switches on automatically. Put off the headphones, the addition CL 7350 OPTICLIP switches off automatically. This protects the battery and does not discharge unnecessarily. Very comfortable to wear: so that the chin strap headphones are comfortable to wear even during prolonged use, it has been designed extra light (58 g). Optional: DUO version (model number: CL7350-2_OPCL_BLKVDE) available functions. Transmission method: stereo. Optical connection on the base station. Easily accessible settings on the headphones: volume up to 125 dB spl. Balance control. inks/rightrightrightrightrightts • Sound control according to your needs Automatic standby mode (if no more signal) Built-in microphone for amplifying the sounds of the environment, so you can talk with other people in the room at any time. Comfortable and easy technical specifications: 863 MHz 2 channels. Sound frequency: 30 – 10,000 Hz. Quick charging. Charging time: 3 hours. Automatic charging as soon as the headphones are placed in the base station. Outdoor range 60 m and 25 m inside. 3.5 mm stereo jack socket. Operating time 6 hours. Weight of headphones: 58 g. Package contents: 1. Receiver 2. Its charging station 3. Power adapter 4. Optical Cable (Toslink) 5. Pair of replacement headset