Feature: Memory Pairing: After connecting once and taking it out of the charging compartment, it can automatically connect and pair.. Bluetooth 5.1: The earphone with Bluetooth 5.1 is fully compatible for android, for windows system and for IOS system. One Button Operation: One mechanical button to operate is convenient and practical, bringing you better using experience. IPX6 Waterproof: High quality IPX6 waterproof earphone can be washed directly, no fear of sweat. The blisters are not damage. Long Working Time: The earphone can support about 48h cumulative call duration and 24h long time music listening. Noise Reduction: The earphone with good noise reduction function can bring you intelligent filtering using experience, with clearer call and music. Comfortable: The earphone is comfortable to wear for long time. You even can wear it to fall sleepy without knowing it. Low Latency: The earphone has low latency, perfect for smart phone game player. Touch Control: The convenient touch control operation helps you get rid of discomfort of traditional button. Specification: Item Type: Wireless Earphones Bluetooth Version: 5.1 Working Distance: 10M Noise Reduction Version: CVC 8.0 Charging Compartment Input Current: 5V 1A Color: Black