Four microphones, an impedance of 16, a frequency range of 2.4 to 2.4835 GHz, in-ear coupling, and headphone frequency of 20 to 20000 Hz are all included in the JBL Tune 230NC TWS specifications12. The earphones have an IPX4 sweat and dust-proof certification32 and utilise Bluetooth 5.2. With ANC turned on, the battery life may last up to 8 hours and 10 hours, respectively3. A lithium-ion polymer battery powers the earphones, and a dedicated phone app may be used to adjust playing and monitor the battery level3. The dynamic frequency response spans 20 Hz to 20 kHz, and the JBL Tune 230NC TWS has a sensitivity of 105 dB.
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