built-in battery led handwritten board 1.60x80cm(23.6x31.5inch) 2.CE and ROHS approved 3.OEM available 4.2 years warranty built-in battery led handwritten board led handwritten board---Transparent toughened glass, the transmittance rate reached 99%, not broken, no radiation,strong brightness, high hardness, with no scratches for many years, easy to transport ...
