Awei A780BL Headphones Foldable Earphones High Bass Headset Wireless Bluetooth Headphone Earphone Product Features: Bluetooth 5.0 version, stable performance, long distance and good endurance With TF card function 3D ear muffler, comfortable to wear Iron bow design to increase product bow life and texture Folding design, easy to carry Bluetooth Specifications; Bluetooth Version 5.0 Profile Support: HFP/A2DP/AVCTP/AVDT/AVRCP Stand-by Time: 100h Talk Time: 12h Music Play Time: 13-15h Charging Time: 2h Charging Voltage: DC 5V Frequency Range: 2.402G-2.480G Ambient Temperature: -20/+60°C Transmission Distance: 10m Battery Capacity: 250mAh Note: -The product is measured by hand and may have an error of 0.1 cm - 1 cm. -Due to factors such as photographic equipment, the actual items -may differ from the pictures, please understand. -Have a pleasant shopping experience and have a pleasant life. Thank you.