This is a 6-layer printed circuit board. The PCB is carefully designed for multiple electronic products. Well-equipped, this PCB guarantees high performance and great durability. 

• Material: FR4.
• Thickness: 1.6mm. 
• Layer: 6. 
• Copper thickness: 1oz. 
• Solder mask: blue.
• Silkscreen: white.
• Surface finish: ENIG, 2-5u".
• Peelable mask: none.
• Impedance control.
• X-out: no.
• Press fit: no.
• Via in pad.