• listening to the song correct, support songs and call, 
• remind call number, the last call back, all intelligent Chinese and English voice prompts, boot, pair, shut down the phone power will be low voice prompts; 
• Power capacity will show on your iPhone, you can see the power situation anytime, do not worry about the electricity ,make your life without worry; 
• One to two connections, can be connected to two mobile phones at the same time 
• Bluetooth headset connected to the phone after the shutdown  , and then open the Bluetooth headset will connect back to the phone  automatically  , more convenient; 
• Intelligent compatibility: support all Bluetooth mobile phone, tablet, notebook, singing it, QQ music, movies, etc., universal all mobile phone

Specification:

Plug Type: Wireless
Function: For Mobile Phone, for Internet Bar, for Video Game, For iPod, Sport, Common Headphone
Wireless Type: Bluetooth
Connectors: None
Waterproof: No
Communication: Wireless
Active Noise-Cancellation: Yes
Support Memory Card: No
Control Button: No
Is wireless: Yes
Model Number: i7S
Support APP: No
Line Length: None
With Microphone: Yes
Resistance: 32Ω
Support Apt-x: No
Style: In-Ear
Sensitivity: 123dB
Frequency Response Range: 20-20000Hz
Vocalism Principle: Dynamic
Volume Control: No
Talk time is about 4-5 hours
Music time about 4-5 hours
Standby time is about 100 hours