Features:
1) No battery required
2) None scratch logo surface
3) Engravable mirrored metal back
4) 100% waterproof
5) Size: 66 x 26 x 8mm
Image files required:
1) Image size: 51 x 19mm
2) Image resolution: 300dpi
3) Image file format: PSD / TIF/ EPS / BMP / AI / JPG