• 50-hour extended battery life • Wireless version 5.3 • Hi-Fi stereo clarity • Elegantly simple design • Comfortable fit Specifications : • Model: MX-TW58 • Chip: AD6983D2 • Wireless Version: V5.3 • Operating Range: ≤10M • Working Frequency: 2.402GHz-2.480GHz • Wireless Protocols: A2DP, AVRCP, HSP, HFP • Talk Time: 5 Hours • Music Time: 5 Hours • Standby Time: 50 Hours • Earbuds Battery: 3.7V / 30mAh • Charging Case Battery: 3.7V / 300mAh • Charging Time: 2.5 Hours • Charging Port: Lightning