Wireless technologybluetoothcable length9. 4wireless operating distance100 ftbluetooth standardbluetooth 5. 3 + leminimum frequency response20 hzmaximum frequency response20 khzfeatureshearing protectionadaptive active noise cancellationwireless chargingusb chargingbluetooth pairingbattery capacity (earbuds)66 mahbattery capacity (charging case)500 mahfast charging time5 minutebattery talk time detailsup to 5hrs (anc on - earbuds)up to 16. 5hrs (anc on with charging case)battery listening time detailsup to 8hrs (anc on - earbuds)up to 33hrs (anc on with charging case)battery recharge time detailsfast charging time: 5 mins = 1 hrmaximum battery recharge time: <2 hrs to fulldriver size0. 46signal to noise ratio (snr)66 dbearpiece sensitivity details106 ± 2db @ 1khz/1mwmicrophone frequency response100 hz to 8 khzcharging interfaceusb type-cwirelessearpiece controlsvolume up/downanc on/off/enhanced transparency modeanswer/reject callmic on/offnext/previous tracksoftware includeddell display and peripheral managerdell device management consoledell audio mobile appdell pairminimum charging power2. 50 wmaximum charging power5 wpackage contentsdell pro plus earbuds - eb525dell wireless audio receiver - hr024usb-c charging cableuser documentation