LED countdown clock,outdoor led clock,led digital clock display 1.sturdy frame, waterproof material 2.colorful background LED countdown clock,outdoor led clock,led digital clock display1. super bright ,conspicuous in dark or dim place ,can attract peoples eyes . 2. Low working voltage, great save-power ability 3. Very long working life , LED light life more than 100,000 hours . 4. Be made of ...