Descriptions:Macaw GT100s In-ear Earphones features changeable tuning click so that you can simply realize the ideal sound according to the different types of music. With inversion unit design, it redefines the HiFi earphones and you will experience more soft and comfortable hearing in the same cavity space. Super bass is also a highlight of GT100s earphones, just wearing it and enjoying a detailed and delicate auditory feast. Main Features:Changeable Tuning Click: Enables you to enjoy the different types music completely and ideally ( Come with 2 pairs tuning click)Inversion Unit: Provides more comfortable hearingSuper Bass: Perfect hearing feels for youBuilt-in Mic: Supports hands-free callsOn-cord Control: Supports answer / hang up calls by one-keyUniversal 3.5mm Plug: Applied to all of the 3.5mm jack audio devices Brand: Macaw Model: GT100s Type: In-Ear Wearing type: In-Ear Function: Answering Phone,HiFi,Microphone,Song Switching Color: Black,Silver Connectivity: Wired Application: Mobile phone,Portable Media Player,Sport Plug Type: 3.5mm,Full-sized Cable Length (m): 1.35 m Frequency response: 5Hz - 16KHz Impedance: 16ohms Sensitivity: 100dB Compatible with: Mobile phone 0.350 Package weight: 0.393 kg Package size (L x W x H): 12.00 x 12.00 x 5.00 cm / 4.72 x 4.72 x 1.97 inches Package Contents: 1 x Macaw GT100s Earphones, 3 x Silicone Earbud Tips ( Pair), 2 x Memory Foam Earbud Tips ( Pair ), 2 x Tuning Click ( Pair ), 1 x Storage Bag, 1 x English and Chinese User Manual