Soft and flexible silicone neckband in ergonomic and stylish design, make your wearing comfortably and you could wear the headphone all day. Product Details Product Type: Wireless, Bluetooth in-ear headphone Chipset:BK3266 Signal range: 33 ft in open space Playing time: 12 hours Driver size: 10 mmUnit Weight: 36gCharging Time:1 hours Bluetooth Version: V5.0 What's in the box1 * A23 Bluetooth Neckband headphone 2 * extra sets of eartips (L&S) 1 * US-C Charging cable 1 * User manual