CVJ-CSN In-Ear Dual Magnetic Circuit Dynamic HIFI Wired Earphone, Style:Without Mic(Black) Type-3.5mm & 2.5mm Cables SIM card reader socket board

SIM card reader socket board for iPhone 7

40HQ: 1356 cartons * 400 pcs = 542400 pcs

10X optical zoom professional conferencing camera for business meetings

you can switch freely according to your preferences

the metal shell can effectively block external interference and ensure less signal loss transmission

CVJ-CSN In-Ear Dual Magnetic Circuit Dynamic HIFI Wired Earphone, Style:Without Mic(Black) Type-3.5mm & 2.5mm Cables SIM card reader socket board1. Cable length: 1. 25m 2. Product weight: 29g+ 3 3. Speaker: New 10mm dual magnetic moving coil + 2 medium and high frequency moving iron combinations + 2 high frequency moving iron combinations + 1 high frequency moving iron 4. Impedance: 22 ohms 5. Average sensitivity: 108+3db 6. Frequency response range: 7 40000Hz 7. Plug Type: 3. 5mm Gold Plated 8. Secure and comfortable fit around the ear, ergonomic in ear design 9. Suitable for sports, running,