Features: 
Piston design, give you a better sound quality.
Pure copper voice coil, more durable.
New dual damping system for purer sound quality.
Durable, break-resistant Kevlar fiber cable.
3.5mm gold-plated jack plug.
Safe, high-grade silicone.
Compatible with most Android phones, and support part of the function for IOS devices.
 
Note:
Volume Control Doesn't work for iPhone.

Specifications:
Material: Silicone
Brand: Xiaomi
Earphone Type: In-ear
Color: Black, White (Optional)
Cable length: 1.2m / 3.9ft
Frequency range: 20-20000Hz
Earphone sensitivity: 93dB
Speaker impedence: 16ohms
Maximum practical power: 3mW
Earphone weight: 10g / 0.4oz
Package size: Approx. 7.1 * 7.1 * 2.2cm / 2.8 * 2.8 * 0.9in
Package weight: Approx. 24g / 0.8oz

Package including: 
1 * Earphone
2 * Earbud (S)
2 * Earbud (M)
2 * Earbud (L)