1.Transparent frame, crystal dedicated Spec:A0, A1, A2, A3, A4, A5; 2. L-source: LED energy saving Single-sided Crystal ultra slim light box series 1 Transparent frame, crystal dedicated2 Convenient pictures changing3 High-tech LGP technology ,light well-distributed,brightness4 Led light souce.energy saving and long life span5 Applications:hotels,photo studio ,company.exhibition halls & family