What's in the box:

Xiao-mi Headset LYXQEJ01JY BT Earphones Necklace Earbuds (Grey)

Xiao-mi BT sports earphones, with dual drivers and ergonomic design, gives you a CD-grade music experience.

Features:
Dynamic driver and balanced armature driver, more pure and mellow three frequency.
High fidelity transmission, support AAC audio decoding and apt-X, rich immersive sound.
Lightweight, ergonomically designed for more comfortable wearing.
Magnetic-earbud, hang it around your neck without worry about dropping.

Specifications:
Brand: Xiao-mi
Model: LYXQEJ01JY
Color: Black, coffee, grey(optional)
Type: In-Ear
Material: ABS
Wearing type: In-Ear
Application: Running,Sport
Compatible with: i-Phone,Mobile phone
Connecting interface: Micro USB
Connectivity: Wire-less
Frequency response: 20-20000Hz
Impedance: 32ohms
Sensitivity: 100dB
Music Time: 8h
Standby time: 200h
Talk time: 10h
Bluetooth: Yes
BT chip: CSR8645
BT distance: W/O obstacles 10m
BT mode: Hands free
BT protocol: A2DP,AVRCP,HFP,HSP
BT version: V4.1
Battery-type: Built-in
Battery-capacity(mAh): 137mAh Li-ion b-attery
Package weight: 250g/8.81ounces
Product size (L x W x H): 850 x 50 x 30mm / 33.46 x 1.97 x 1.18 inches
Package size (L x W x H): 205 x 175 x 39mm / 8.07 x 6.89 x 1.54 inches

Package list:
1 x Pair of Earphones
1 x Charging Cable
3 x Pair of Eartips
1 x English User Manual