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- Display color: blue, white
- Hat size: 26*20*11cm
- Display size: 150*37mm
- Lighting area: 131*32mm
- Controlled by APP
- Display content: Any language
- Can display 80 English characters
- Edit mode: Bluetooth mobile APP
- Battery powered: USB charging 3.7v polymer lithium battery
- Material: cotton cap + LED display
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