What kind of radiation is emitted during the app connection?

Basic and Premium sound devices emit no waves at all. Premium App sound devices (MB01 and MB02) feature a Bluetooth® Low Energy 5.0 module with a maximum peak output power of 1.3 mW (1.08 dBm) emitting at 2.4GHz frequency. It means that MB01/MB02 emits ca. 800 times less electromagnetic radiation than a mobile phone with GSM 900MHz and 400 times less than a mobile phone with GSM 1800 MHz. Because the Bluetooth® Low Energy Module does not transmit data continuously, but sends occasionally short bursts, its average output power is less than 0,2mW (-6.92dBm).