Features: Stable Connections: Bluetooth 5. 0 offers low power consumption, and more stable connections with zero transmission delay. Premium Sound Quality: Enjoy high quality audio and clear microphone phone calls. Up to 30 Hours of Playback Time: Get up to 4-5 hours playback time from a single charge and up to 30 hours of playback time when used with the charging case provided. One-Step Pairing: Your earphones will connect instantly once removed from the charging case, and will auto-connect with the last-paired device. Lightweight and Portable: Our charging case is easy to carry. Simply put in your pocket and go. Enjoy music no matter where you are. Specifications: Model: T12 Bluetooth Standard: V5. 0 Operating Range: 33 feet/10 meters (No obstacles between) Supporting Protocols: A2DP/HFP/HSP/AVRCP/SPP Charging Time: 1. 5 hours (ear buds); 2 hours (charging case) Talking/Playing Time: about 5 hours (Varies according to volume level and audio content) Charging Voltage: DC 5V Battery Type: Li-polymer Battery Capacity: 30mAh (earbuds); 500mAh (charging case) Package Contents: 1 pair of Wireless Earbuds 1 x Charging Case 1 x Micro USB Cable 1 x User Manual