Features: Better balance damping system (3rd Generation) Sandwich style metal composite technology for diaphragm "Spiral Pipe" sound chamber, bass performance optimization Fashion flat line design, built-in kevlar fiber, more resistant to pull A large number of medical ear canals data, wearing more comfortable More professional tuning mode with super fine and sophisticated design Built-in capacitor microphone line is compatible with Android and other mobile phones Support Xiaomi devices and iOS devices such as iPhone and iPod (some functions do not work on some Androids and iOS) Specification: Style: In-Ear Brand Name: Xiaomi Compatible: For xiaomi MI2 MI2S MI2A Mi1S M1 Phones and most Android devices, partially compatible on iOS devices Sensitivity: 98dB SPL Speaker impedance:32Ω Frequency response range: 20-20000 HZ Implementation of standards GB / T 14471-2013 Connectors: 3.5mm Communication: Wired Connecting line Length: 1.25M Material: Metal + Silicone + TPE Color: Black,White,Blue,Pink,Purple Function: Noise Cancelling, Microphone Wire control button function : play/pause, answering/hang up (no volume) Package Including: 1*Original Xiaomi Colorful In-Ear Earphone Ships in 7 business days. It is shipped from China. Delivery is provided by China Post Air Mail. Delivery time depends on the couriers, local customs in your country also holidays, weather conditions. Usually it takes from 39 to 60 days, depending on the customs at your country.