Product detailsProduct detailsH628BT headphones just need to open and cover the ears, can be adjusted in size to fit each person’s head mold.?Due to its versatility, the H628BT is suitable for many audiences and ages.-Very quiet sound, good batteryHavit H628BT over-ear Bluetooth headset has a built-in 40mm driver.?You can enjoy a variety of beautiful, mellow and impressively quiet sounds.-The battery equipped with the Havit H628BT headset can provide up to 9 hours of music playback.?You can carry the headset anywhere for a few days without worrying about running out of battery midway-Its 40mm dynamic speakers are combined with high quality Bluetooth V5.3, guaranteeing to deliver high quality sound perfectly.It has a folding design for easy portability.-Wireless Bluetooth headset with 3.5mm AUX input can be used as a wired headset.It isolates external noise with increased sound insulation.-Usage Time: 9 Hours-Charging time: 30 minutes-Battery: 3.7V 200mAh-Speaker: 40mm, 108dB-Frequency Response:20Hz-20KHz-Input voltage:5V/1A-Communication:Wireless-Folding design: yes-Multifunction Buttons: yes-Ski-friendly material: yes-Use:Mobile Phone, COMPUTER, Dj, Gaming, Sports, Travel, PROFESSIONAL, HiFi Headphone-Function:Microphone, BT,TF card,FM,AUX-Dimensions: 196x182x82mmCharger Type: Type-C-Weight: 225g