Before purchasing! 1. No charger included. Please charge the headset on the base of your current SIMOLIO 2.4GHz headphone system. 2. Check the image below to know if this replacement headset receiver is compatible with your current headset system. If you are still not sure about the compatibility, send SIMOLIO support a message for a quick and confirmed answer! Our response is within 1-10 hours generally. BALANCE (left / right) The BALANCE control is specially designed for people with different hearing levels of the left and right ears. They can adjust the balance control as needed to best fit their listening requirements. Volume Control Designed with independent volume control, customized your desired sound level. Personal Sound Amplifier Button The personal sound amplifier function is designed as an additional & unique feature to help people to temporarily hear what people are talking to him when watching TV. Comfortable, Durable and Flexible The unit incorporates "memory stainless steel strips" at the headset beams for adjusting to more comfortable wearing angle and shape. Super- soft and body-heat activated memory foam make you feel much more comfortable. BALANCE (left / right) Volume Control Personal Sound Amplifier Button Comfortable, Durable and Flexible SIMOLIO Replacement TV Headphone for Under Chin Headphones, Replacement Heads... SIMOLIO Additional Wireless TV Headphone, Replacement Headset Under Chin Head... Add to Cart Buying Options Customer Reviews — 4.4 out of 5 stars 294 Price $74.99$74.99 — no data Charger Included NO NO Battery Included ✓ ✓ Compatible With My Current Chin Headphones Or Not SIMOLIO model SM-823D Pro headset purchased after November 12, 2024; SM-824D1 headset purchased after November 9, 2024; SM-824D2 purchased after October 26, 2024 SIMOLIO model SM-823D Pro headset purchased before November 12, 2024; SM-824D1 headset purchased before November 9, 2024; SM-824D2 purchased before October 26, 2024, SIMOLIO model SM-8245 and SM-8245D