DescriptionThe lightweight and ergonomic design also ensures that any type of ear can be worn comfortably in everyday use. Wireless V4.1 version and smart chip to ensure faster,and support voice calls.Festured- Color: Blue - Material: Plastic. - Size: 9x4x2.3cm/3.54x1.57x0.9inch. Version: V4.1 Chip: CSR8615 Transmission power: class 2 Frequency: 2.4GHz Distance: >10m Talk time: 5-6h Protocol: A2DP, AVRCP, HSP, HFP - 270 degree rotatable, you can wear it on your left or right ear. - Ergonomic design, skin-friendly and comfortable to wear. - Noise reduction windproof sponge plug and CVC 6.0 noise reduction, better talking experience. - Easy to change volume or switch song with the earphone. - Multi-point connection, easy to connect 2 devices at the same time and switch between them.