These Bluetooth earbuds with V5.3+EDR and JL6973D4 chip support A2DP, AVRCP, and HFP. They have 6mm speakers, -42DB mic sensitivity, and a 10m range. The earbuds offer 2-4 hours talk time and 3-4 hours playback, charging in 30-45 minutes. The 500mAh case charges in 1-2 hours.