Waterproof Solar Powered Flashing LCD Keychains with Image Inside, making your logo or advertise more attactive and motional. Good for your premiums, promotional gifts and collection. Features: New technology: Solar powered LCD No batteries needed. Flash all the time in rooms or outdoor lights Waterproof Create your own image design Specifications: 1) Item dimensions: SPK-01/ 6. 0 x 3. 0 x 0. 8cm (the SPK-01 model can be exchanged the built-in photo according to your favorites by yourselves); SPK-02/ 6. 0 x 2. 5 x 0. 8cm; SPK-03/ 4. 8 x 2. 5 x 0. 8cm; SPK-04/ 3. 5 x 1. 8 x 0. 7cm. 2) Image files requested 3) Image size: SPK-01/ 32. 5 x 24. 5cm; SPK-02/ 51. 7 x 18. 9cm; SPK-03/ 36. 5 x 19. 0cm; SPK-04/ 26. 0 x 12. 0cm. (or also designed with a scale of: SPK-01/ 32. 5: 24. 5; SPK-02/ 51. 7: 18. 9; SPK-03/ 36. 5: 19. 0; SPK-04/ 26. 0: 12. 0. ) 4) Image resolution: 300dpi 5) Image file format: PSD/TIF/EPS/BMP/AI/JPG