?Adopt Bluetooth 5.0 stereo calls? Wireless headphones are equipped with Bluetooth 5.0 chip and built-in two-microphone noise canceling design, which offers high quality stereo sound, powerful bass and keeps latency low during playback or video making. Both the left and right earphones support call answering and suspending, ensuring a smooth and effective calling experience. ?Wireless Wireless listening experience:? You won't have to worry about tangled cables when using these wireless headphones, since they connect via bluetooth and the connection is stable over a distance of over 10 meters. In terms of ergonomics, the elegant aerodynamic design guarantees a stable and 100% user experience. This headphone has three S / M / L accessories, depending on the size that fits the ear for an optimal listening experience. ?Portable charging case and waterproof IPX5:? Built-in 55 mAh battery for each headphone with a light weight of only 4 g. Bluetooth 5.0 With low power consumption, it offers up to 4 hours of continuous conversation or music on a single charge. The small design also makes the case more portable. Waterproof IPX5 protects the headphones from sweat, water, rain, etc. and make sure you enjoy stereo music while you are working. ?Automatic pairing and minimalist design? Remove both wireless headphones from the charging case, they will automatically turn on and connect to the phone in seconds. You can easily change the on / off mode, pairing mode, call mode, play mode or pause mode via the multi-function button. ?Universal compatibility? With the new Bluetooth 5.0 chip, these Bluetooth handsfree kits are compatible with all smartphones and devices with Bluetooth capabilities, Android ? iPhone, tablet PCs and laptops etc.