| Feature | technical specification |
| Number of layers | 4 - 22 layers standard, 30 layers advanced, 40 layers prototype. |
| Technology highlights | Multilpe layers of epoxy glass fiber bonded together with multiple layers of copper of varying thicknesses. |
| Materials | High performance FR4, halogen-free FR4, low loss and low Dk materials |
| Copper weights (finished) | 18μm - 210μm, advanced 1050μm / 30oz |
| Minimum track and gap | 0.075mm / 0.075mm |
| PCB thickness | 0.40mm - 7.0mm |
| Maxmimum dimensions | 580mm x 1080mm, advanced 610mm x 1400mm |
| Surface finishes available | HASL (SnPb), LF HASL (SnNiCu), OSP, ENIG, Immersion Tin, Immersion Silver, Electrolytic gold, Gold fingers |
| Minimum mechanical drill | 0.20mm |
Silver, deep empty gray, gold, or rose gold anodized metal case
Ion-X glass material
A Retina display with Force Touch function
Back of composite material
Digital Crown
Heart rate sensor, accelerometer, and gyroscope
Ambient light sensor
Loudspeaker and microphone
Wireless network (802.11b/g/n 2.4GHz)
Bluetooth 4
Battery time of up to 18 hours. *
Waterproof * *
WatchOS 2
Apple Watch
Magnetic charging cable (2 meters)
USB power adapter (5W)
The strap (the movement type strap can be assembled into the length of S/M or M/L)
quick start guide