System Features: – Dual Headsets with Convenient Wireless Design – Hearing Audio Amplifying Systems – Effectively Reduces Background Noise – Noise-Cancelling & Voice Clarifying Technology – Tested to Provide a More Comfortable Listening Experience – ASC (Automatic Signal Control) Regulates & Balances Sound – Charges By Connecting Headset to Power Dock Base – Built-In Rechargeable Batteries – Universal Size Fits All Shapes & Sizes – Tone, Balance & Volume Control Adjustable – Built-in Microphone (Used for Telephone / Smartphone Calls) – Also Connects to Televisions, Computers, DVD Players, etc. – Receiver Inputs: Audio (3.5mm), Coaxial & Optical Connectors – Power Saving Auto Power-Off Accessories Included: – (2) Wireless Hearing Amplifiers – Power Dock Charging Base – Replacement Earbuds – Aux (3.5mm) / RCA Audio Connection Cables – Clip-On Microphone Extension Cable – Digital Optical Fiber Cable – Wall Power Adapter + USB Charging Cable Technical Specs: – 2.4GHz Wireless Digital Audio Transmission – Battery Type: Lithium-iOn, 3.7V – Battery Life up to 18 Hours – Average Charging Time: About 3.5 Hours – Audio Transmission Range: Over 50’+ Feet – Frequency Response 20Hz – 15KHz – Transmission Rate: 2Mbps – Distortion: < 1.0% – S/N Ratio: 80dB