Htdz HT-2288 series ultra-high frequency conference system microphone can be connected to up to 999 microphones in one system and also up to 5 microphones, 1 for the chairman and 4 for the visitors can be used at the same time. The built-in rechargeable batteries in microphones can be used to power them. Battery life is around 8 hours when speaking and approximately 16 hours when on standby. The use of wireless communication technology eliminates the requirement for conference units to be connected. Installation may be done quickly and efficiently without the need for complicated setups. It has a feedback reduction technology that efficiently reduces feedback and noise.