The power case with built in 2200mAH battery can supply your earbuds play over 100 hours and USB port doubles as a portable charger for your phone. never lost music and power on the go.

Technical Specification:

• Built in the best solution 5.0 for TWS
• Built in lithium battery: 50mAh x 2
• Built in lithium battery case: 2200mAh
• S/N:≥90db
• Speaker size: 8mm
• charge time: 2.5 hours
• Play time:4 hours/per charge, over 100 hours with power case
• Double tap for Siri and Google assist control