PRODUCT GRADING Refurbished Excellent > Very light scratches and light signs of use > Refurbished to the highest standards. Retail Box WHAT IS IN THE BOX Nuraphone Over-Ear Wireless Headphones - Black PRODUCT DESCRIPTION The world's only headphone that automatically learns and adapts to your unique hearing. Nura Personalised Sound automatically measures your hearing in 60 seconds by measuring otoacoustic emissions. Answer calls on your Nuraphones, with external microphones for voice clarity. A music-activated cooling system. TeslaFlow uses Tesla valves (a flow with no moving parts) to circulate warm air out of the ear cups.Choose if you want to hear conversations and your surroundings, or tune out everything except your music. Activate Social Mode and outside sounds pass into your nuraphones. PRODUCT INFORMATION Silicone ear pieces. USB-A cord. Detachable cable. Connection: wireless. Bluetooth enabled for a wireless connection to your devices . With a 3.5mm jack connection. 3.5mm jack . 15mm driver. In-line controls. Adjustable headband. Active noise cancellation. 10m range. Carry case. Bass control. Compatible with universal smartphones. Batteries required 1 x rechargeable battery