Specification: 
– Loudhailer diameter: 40mm (NdFeB) 
– Cable length: 7.2ft
– Frequency range: 20 to 20,000 Hz
– Sensitivity: 115 +/- 3dB at 1kHz
– Plug: 3.5mm ( 4 pin ) 
– Impedance: 32 Ohm at 1kHz
– Max input power: 15mW
– Mic sensitivity: -54+/-3dB
– Distortion: Smaller than 5%THD

What’s in the box: 
• Sades SA-810 Headset
• 3.5mm Jack Cable 1 to 2
• User Manual

FAQ
1. There is only sound in one side when you listening to the music by the headphone? 
A). Make sure the plug have put into jack absolutely; 
B). Make sure your equipment in 3.5mm 4 pin; 
C). Make sure the plug is in international standard not national standard. 

2. There is sounds of electric current when you listening to the music by headphones? 
A). Make sure the plug have put into jack absolutely; 
B). Make sure headphone is away from some electrical equipment which has stronger magnetic field such as mobile phone, fan, and so on; 
C). Please check whether the computer microphone is turn on, if not, please open the control panel on the computer-sound-recording-level-the microphone, adjust the microphone to strengthen mode.