Overview: BT 5.1 technology brings high-speed data transfer speed, stable performance, and low power consumption. With TWS technology, you can use the headset solely or used them in pairs. Auto fast pairing between left and right earbuds once taking out of the case. Equipped with a charging box to charge the earbuds. Built-in Microphone delivers clearer and more realistic sound. It will bring you perfect user experience. Features: True wireless design, left and right earphone channels are separated. It can be used solely or used in pairs. BT 5.1 ensures high data transfer speed, stable and fast connection, and low power consumption. Lightweight and mini size fit well to your ear canal, comfortable to wear. Built-in Mic on both earbuds delivers clearer and more real talking sound in stereo mode. Sweatproof, no worry about splashing water and sweat, enjoy music and sports freely. A charging case can charge and store the earbuds. With digital display, the remaining power can be shown. Supports touch control. Easy to control music and call. Specifications: BT Version: 5.1 Transmitting Distance: 10m/33ft Frequency Range: 40-20KHz Sensitivity: 106±3dB Impedance: 32Ω Charging Case Battery Capacity: 3.7V 300mAh Earbuds Battery Capacity (Each): 3.7V 50mAh Music Play Time: about 3 hours (depends on music volume) Charging Time: about 2 hours Color: Black, White, Blue, Red ,Pink,Yellow,Light green,Light Blue (Optional) Item Weight: 7.3g/0.25oz (Pair) Package Size: 12.2*8.0*3.3cm/4.80*3.14*1.30in Package Weight: 62g/2.18oz bluetooth earbuds 5.1 Package List: 1 * Pair of Earbuds 1 * Charging Case 1 * Charging Cable 2 * Pair of Eartips 1 * User Manual (English) bluetooth earbuds 5.0（Low quality） Package List: 1 * Pcs of Earbuds 1 * Charging Cable