PRODUCT GRADING Excellent (Grade B) - Will have very light scratches and light signs of use > Refurbished to the highest standards. Item may arrive in non-original retail packaging. WHAT IS IN THE BOX Sony WH-CH510 Wireless Bluetooth Headphones PRODUCT DESCRIPTION Listen to your favourite music tracks without the hassle of tangled wires. The Sony WH-CH510 Wireless Bluetooth Headphones pair with your smartphone or tablet for cable-free listening. They work up to 10 metres away from your device, so you could even pair the headphones with your PC while you\'re working from home, and feel free to walk around the house with music in your ears. Up to 35 hours of battery life With a massive battery life of up to 35 hours, listen for over four workdays or tons of commutes before you even need to start thinking of putting the WH-CH510 Headphones on for a charge. With a quick-charge function, you can get an hour\'s more music from just ten minutes of juice - perfect for tiding you over for the last bit of the day. Hands-free calling Make hands free calls using just your headphones - no need to dig your mobile out of your bag. It\'s easy thanks to the built-in microphone. Just press and hold the play button to activate the voice assistant while paired with your Android or Apple iOS smartphone. Just say who you want to call, and get chatting. And speaking of voice assistant, you can also ask for directions, play music and loads more. Lightweight design Your headphones should never get in the way, or weigh you down. That\'s why they\'re wireless, and have a lightweight design. They\'re comfortable, too. Soft earpads feel delightful on your ears. The earcups also swivel flat for easy storage so you can take them wherever you go. PRODUCT INFORMATION Type - On-ear Colour - Black Jack - No Bluetooth - Bluetooth 5.0 Wireless - Yes Bluetooth / wireless range - 10 m Type of earcup - Swivel & fold-flat earcups Acoustic system - Closed Passive noise-isolating - No Active noise-cancelling - No Compatible voice assistant - Google Assistant - Siri Microphone - Yes Volume control - Yes Remote control - No Control compatibility - Android - iOS Control positioning - In-line Driver type - Neodymium drivers Speaker diameter - 30 mm Frequency response - 20 - 22,000 Hz