1.Russian Friend : Please fill in receiver\'s full name in the order due to new policy of Russian customs, otherwise you probably won\'t receive package finally .
2.For Brazil customer, please offer us your value added tax number (CPF number) in the order message, the CPF number needs to be provided to courier before shipping. Thank you.
Attention: Blue color for left ear,red color for right ear, 1.2-channel fulll digital circuit
2.6db Noise Reduction processing system
3.Automatic feedback compression DFS system
4.High-perfermance microphone and receiver
5.Tiny and invisible shape ensures an easy and comfortable wear
7.Trimmer Volume control
8.Both close and open ear tips
Frequency Range: 200Hz~7645Hz