Features:* Upgraded BT 5.3 chip, provides one-step pairing, faster transmission speed, more stable connection and lower power consumption.* Feature three modes including game mode, video mode and music mode. Freely switch among them by four-tapping the touching button.* Graphene composite diaphragm delivers surround sound with abundant details. Double-core microphone with noise reduction brings clear calls for smooth communication.* AI light intelligent digital display, shows clearly remaining power of charging case and left / right earphones. The screen can also be used as a mirror for makeup fix.* 1200mAh large capacity charging case, offers long-lasting battery life. Meanwhile, it can work as a power bank to charge a mobile phone for emergency.* By fingertip-touch control, you can freely switch song, adjust volume, answer / reject phone call, waken voice assistant, etc.* The left and right earphone can be used together or independently via random switching, meeting various needs of users.Note:* Please read the user manual carefully before use.* There may be slight errors due to manual measurement.Specifications:Model: YD03Material: ABSColor: BlackBT Version: 5.3Transmission Distance: 10mEarphone Battery: 50mAhCharging Box Battery: 1200mAhCharging Time: 1-2HCall Time: about 5HPlay Time: about 5HCharging Case Size: 80.8 * 55 * 30.7mmItem Weight: 86g / 3.03oz (with charging case)Package Size: 11.2 * 8.9 * 4.5cm / 4.41 * 3.5 * 1.77inPackage Weight: 121g / 4.27ozPackage List:1 * BT Earphones1 * Charging Box1 * Charging Cable4 * Earplug Silicone Caps1 * User Manual