The Monoprice BT-500ANC Over Ear Active Noise Cancelling Headphones are great everyday wireless headphones for use at home; at work; or while traveling. Featuring a foldable; extremely portable design; 40mm drivers; and active noise cancelling technology; the BT-500ANC utilizes Bluetooth® wireless technology to connect with your mobile device at distances up to 32 feet away. They feature the Qualcomm® aptXTM HD audio codec for crystal clear; CD quality sound. Experience exceptional sound quality; comfort; and design with the Monoprice BT-500ANC Over Ear Active Noise Cancelling Headphones! Support Files: User’s Manual (Aug 29; 2019) The Bluetooth® word mark and logos are registered trademarks of Bluetooth SIG; Inc. Qualcomm® is a trademark of Qualcomm Incorporated; registered in the United States and other countries. cVcTM; aptXTM; and the aptX logo are trademarks of Qualcomm Technologies International; Ltd. Qualcomm® aptXTM and cVcTM are products of Qualcomm Technologies International; Ltd. GoogleTM and Google AssistantTM are trademarks of Google LLC. Updated Feb 26; 2020