office, one earphone, overhead, closed, wireless, USB A, Bluetooth v 4.2, radio channel, 20 – 20000 Hz, 32 Ohm, battery: up to 13 h, with case + base — 4 ohms
office, overhead, closed, wireless, USB A, Bluetooth v 5.0, NFC, radio channel, 40 – 16000 Hz, battery: 650 mAh, up to 13 h, with case + on transmitter
office, overhead, closed, wireless, USB A, Bluetooth v 4.0, NFC, active noise cancellation, 70 – 20000 Hz, battery: up to 15 h, with case + transmitter
office, overhead, closed, wireless, USB A, Bluetooth v 5.2, AAC, active noise cancellation, voice assistant, 20 – 20000 Hz, battery: up to 18 h, with case + Bluetooth adapter
office, overhead, closed, wireless, Bluetooth v 5.2, radio channel, 20 – 20000 Hz, battery: up to 13 h, with case + - media mode, 100 – 6800 Hz - talk mode
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