Sennheiser CX True Wireless Black, Wireless In-Ear headset headphones, Bluetooth 5.2, Up to 9 hours operating time, Up to 27 hours operating time with charging box, SBC, AAC, aptX codec support, 7 mm high end transducer, Sensitivity: 110 dB...Sennheiser CX True Wireless Black, Wireless In-Ear headset headphones, Bluetooth 5.2, Up to 9 hours operating time, Up to 27 hours operating time with charging box, SBC, AAC, aptX codec support, 7 mm high end transducer, Sensitivity: 110 dB SPL (1 kHz...altro...