1. This headphone receiver is compatible with all SIMOLIO 2.4GHz wireless TV headphone models, including SM-823 Pro, SM-823D Pro, SM-824D1, SM-824D2, SM-825D, SM-825D Pro, SM-826D, SM-8245, SM-828D1, SM-828D2, SM-621D, SM-621 etc.
2. Please charge the earbuds by your SM-828D1 and SM-828D2 base or USB power cable.
3. Not Bluetooth. Please use it with SIMOLIO 2.4G wireless TV transmitter base.