UGREEN HP203 (35758) HiTune Max5c ANC Bluetooth Headphone features high sound quality that has the capacity to work with ANC. Equipped with Bluetooth Version 5.4, this headphone ensures stable connections within a 10-meter (33 ft) range. The 2400-2483.5Mhz frequency band supports high-quality audio streaming. Powered by a 600mAh polymer lithium-ion battery, you can have a playtime of up to 75 hours ANC off, or 45 hours with ANC on. The headphones charge through a USB-C port, it takes approximately 1.5 hours to get fully charged. The charging input is 5V-600mA and the charging voltage which is limited is 5.25V.