Features: 1. bluetooth 5.0 technology, using the latest bluetooth technology of version 5.0, it can be compatible with the old version, bringing the advantages of faster and longer transmission distance. Adopt true wireless technology, enjoy your wirelessly sports. 2. Single-sided mode and binaural mode, satisfying your need. 3. Auto pairing,take out the automatic power-on connection, no need for cumbersome operation. 4. Noise reduction technology: improve the recognition level of voice, and can easily communicate even in noisy environment. Make the call clearer and more real. 5. Long working duration: With 1500mAh portable charging box which can power your earphone for 5-6 times.The headphones can be continuously listened to music for about 3-4 hours when the headphones are fully charged. 6. Mini stealth earphone, lightweight, and the ergonomic design brings you comfortable and cozy wearing experience. Specifications: Specification Brand Bakeey Model Q13S Color Black Wearing Type In-ear Material ABS Net Weight (g) Earphone: 4g*2 Charging Case: 69g Technical Parameters Microphone Yes Wired Control Not support bluetooth Version 5.0 Transmission Distance 10m Impedance 32 Frequency Response 20-20KHz Battery Capacity Earphone: 50mAh, 3.7V Charging Case: 1500mAh, 3.7V Charging Time (h) 1h Taking Time 4h Working Time (h) 4h Standby Time (h) 120h Package Included: 1*TWS bluetooth Earphone WIth Charging Case 1*Charging Cable 2 pairs of Earcaps 1*Manual