Wireless TV Headphones, Artiste ADH300 2.4GHz Digital Over-Ear Stereo Headphone for TV 100ft Distance Transmitter Charging Dock Rechargeable (Black) ENJOY AMAZING CRYSTAL CLEAR SOUND with a Frequency Response of 30HZ - 20kHZ, Total Harmonic Distortion of 0.5% and Signal to Noise Ratio of 70db. Including wireless headphones, a wireless transmitter that acts as the headphone charging dock and two AAA NiMH rechargeable batteries. WIRELESS UHF TECHNOLOGY - Our 2.4GHz Digital Headphones use radio frequency signals and have an expanded reception range (up to 100ft) that does not require keeping the headphones within line of sight of the transmitter. Perfect for use with your TV, Computer or Hi-Fi radio. LIGHTWEIGHT AND COMFORTABLE - Adjustable soft padded headband and Over-Ear earpads designed to provide maximum comfort. Listen to music for hours and forget you even wear them! RECHARGEABLE BATTERIES (INCLUDED) - The supplied rechargeable NI-MH batteries last approximately 20 hours on a full charge and recharge automatically when you place the headphones on the base station. SMART FEATURES - Smart Power Saving, ON/OFF LED Indicator, Muting, Speed Charge and Low Power Indicator Alert. Notice: Cannot memory Volume after power off. Supports TV, MP3, iPods and Smartphones Devices.