CRYSTAL CLEAR SOUND - Enjoy amazing digital dynamic sound range with a Frequency Response of 30HZ - 20kHZ?? and low THD+N with a Signal to Noise Ratio far greater than traditional analog systems.</br>SUPERIOR RANGE - Listen to your TV?? Computer?? or Hi-Fi radio from your backyard. Unlike others?? these TV headphones use a digital UHF 2.4GHz radio frequency that penetrates walls?? so your signals have an expanded reception range (up to 100ft) that don't require keeping the headphones within line of sight of the transmitter.</br>LIGHTWEIGHT AND COMFORTABLE - Adjustable soft padded headband and Over-Ear earpads are designed to provide maximum comfort. Listen to music for hours and forget you're even wearing them!</br>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.</br>SMART