Wholesale Multilayer Assembly Circuit PCB Board for Bluetooth Speaker Arm Medical Audio Motherboard Assembly Circuit PCB Board. Extensive Layer Options: Supports 1 to 24 layers with thickness ranging from 0.1mm to 6mm. Customizable Surface Finish: Offers HASL, Immersion Gold, OSP, Silver, and other custom surface treatments. Rapid Turnaround Capability: Quickest lead time of 24 hours for double-sided boards and 48 hours for 4-layer boards. Comprehensive Quality Control: Includes AOI, X-Ray, In-Circuit Testing, and 100% electronic testing before shipment. OEM and ODM Services: Full turn-key EMS service including component sourcing, assembly, and design support. Wide Material Selection: Available in FR-4, Aluminum base, Polyimide, Rogers, and other specialized materials. Global Certification Compliance: Certified with UL, ISO9001, ISO14001, SGS, and RoHS standards.