The Shure AONIC 215 True Wireless Sound Isolating? of the second generation offer studio sound quality in a small size format by combining the analogue transduction technology of the single dynamic MicroDriver of the SE215 earphones (black) with the digital Bluetooth 5 technology of the RMCE-TW2 over-ear system. Enjoy exceptional comfort and a secure fit while enjoying a seamless, first-class listening experience, wherever you are. Resistant to water and sweat with an IPX4 rating, these earbuds have been built using components developed for audio professionals, to give you precise sound, combining sharp highs and deep bass. With the Sound Isolating technology, the noises of the surrounding environment are reduced by 37dB, while with the "Ambient Sound" mode you can listen to the world around you by pressing a simple button. The RMCE-TW2 wireless system allows pairing within a range of 10 meters with smartphones, tablets and laptops. With high-quality microphones and built-in controls you will have excellent audio performance in video conferencing, phone calls and listening to music. The built-in battery has an autonomy of 8 hours and is charged in the included case, which, at full capacity, guarantees up to 3 additional charging cycles. With the ShurePlus App? PLAY - free to download for iOS and Android - you can customize the equalization, the functions accessible from the control buttons, the Ambient Sound mode and the alerts. A complete fit-kit of ear tips of various sizes and shapes makes your AONIC 215 earphones True Wireless Sound Isolating? second generation unique and tailor-made for you.SE215 earphone specifications: Frequency response 21Hz-17.5kHz, sensitivity 107dB SPL / mW at 1kHz, impedance 20O; weight 20.8 grams. MMCX connectors for possible connection via cable or other accessories.RMCE-TW2 specifications: operating frequency of transmission in Bluetooth® 5 technology from 2402 to 2480 MHz with integrated antenna. It supports most popular codecs, including Qualcomm aptX, SBC, AAC. Action range 10 meters.