These Bluetooth earphones offer cord-free convenience with a pivot motion fit design that helps these headphones not to fall out while you are running, walking, or doing other natural sudden movements that usually cause earphones to be displaced from your ears. Features: - Mocrox R and D team 10mm five-way frequency divider, small size frequency extending - World first small one mechanical frequency divider for 5-channel sound surround - Patented inner concentrated cavity gaining super bass reduce spikes sound from music - Small one frequency divider and frequency extending speaker, produce five-way surround sound field style, suit for all kinds of music, game, movie, live show program - Soft and comfortable silicone ear cap does not increase ear, comfortable, noise cancellation, flexible, it will not be tired if you wear it for a long time - Three key function microphone with mute design, suit for group warfare, help to get the victory Specifications: - Drive: Moving Coil Type - Maximum Power Input: 5mW - Sensitivity: 105dB ±3dB at 1kHz - Frequency Response: 20Hz to 20kHz - Speaker Diameter: 10mm What's in the box 1 x BTS-1003 Bluetooth Earphones 1 x USB Cable 1 x User Manual