OLIV MODEL T2 TWS Bluetooth Earphone Noise Cancelling with 1500mah Power Bank with led Display Earbuds Compatible for All Smartphone (Black). Charging box with built-in 1500mAh. Can charge 32 times for one earphone, or recharge 16 times for two earphones synchronously Super simple pairing process. Remove the T2 bluetooth headphones from the charger, then connect via the phone’s menu via Bluetooth. Advanced Bluetooth 5.0 with TWS technology. Backward compatible with BT4.2, BT4.1, BT4.0.