Sony MDRRF985RK Wireless Radio Frequency Headphones System(Not Bluetooth headerphone). Wireless Range is up to 150-feet. 25 hours per charge. 40mm drives. Noise reduction system. Super bass. Better sound quality than Bluetooth headphone. No delay than Bluetooth headerphone. Good for YouTube streaming Live  Video streaming. Good for TV and computer audio.. New. No retail box. Comes with power Adapter. Unlike most Bluetooth devices, RF headphones can transmit through walls and solid objects (unlike most Bluetooth devices) – so there's almost no risk of signal degradation. Also, RF headphones can work with minimal audio compression, which means two things: Better sound quality. Much shorter latency (delay). This is new headphone. Not used. But the surface layer of paint cracked due to dry weather. It doesn't affect performance.