More Details:
Macaw T1000 In-ear Sport Waterproof Wired Control Wireless Bluetooth 4.1 Headphone Earphone With Mic
Macaw T1000 In-ear Sport Waterproof Wired Control Wireless Bluetooth 4.1 Headphone Earphone With Mic
Macaw T1000 In-ear Sport Waterproof Wired Control Wireless Bluetooth 4.1 Headphone Earphone With Mic
Macaw T1000 In-ear Sport Waterproof Wired Control Wireless Bluetooth 4.1 Headphone Earphone With Mic

Change Language: Press the "-" and "+" volume button at the same time to change the language.

Features:
Can display battery level on IOS system. 
Designed for sport， very light， not easy to fall off.
IPX4 waterproof level. It is anti-sweat. But not for swimming.
Built-in clear microphone， talk to people freely.
The headphone can connect to 2 devices at the same time.

Specifications:

General Specification
  Brand Name  Macaw
  Model Number  T1000
  Optional Color  Grey， Brown
  Cable Length  0.6m
  Wearing Type  In-ear
  Product Weight (kg)  0.015kg
Technical Parameters
  Bluetooth Version  V4.1
  Bluetooth Protocol A2DP/AVRCP/HFP/HSP
  Wireless Distance  10m
  Bluetooth Chip  CSR8645
  Driver Unit  12mm
  Rated Power  10mW
  Battery Capacity  80mAh
  Standby Time  170 hours
  Working Time  5 hours
  Charging Time  About 1.5 hours
  Impedance  16Ω
  Sensitivity  98dB
  Frequency Response  20Hz-20kHz
  Microphone  Yes
  Prompt Voice Language  English 

Package  Included:

 1 X Macaw T1000 Bluetooth Headphone
 1 X USB Charging Cable
 1 X Headphone Bag
 3 X Pairs Earmuffs
 1 X English/Chinese Manual