Lenovo 4XD1B65028 headphones/headset Wired & Wireless In-ear Calls/Music Micro-USB Bluetooth BlackBluetooth 5. 0, 20 Hz 20 kHz, 32 Ohms, 110 dB, 13 mm, 100 mAh, 25 g The Lenovo Bluetooth in ear Headphones with an in line mic make crystal clear calls and take full control of your listening and voice experience that lets you switch seamlessly between music and calls. Listen in comfort with these wireless Bluetooth Headphones. The comfort fit earbuds boast an ergonomic shape and a soft feel, while the wireless design uses bluetooth to connect to your