led发光皮带扣 产品特性:6条信息,每条信息可以单独控制速度和亮度. hold up 6 messages, (1 can store 512 characters, 2-6 can store 256 characters) -more than 25 hours continuous battery life -7*21 resolution -9 different scrollspeed and brightness --scrolling from right to left, left to right, flash etc. -just manual program with three onboard buttons --two size for choice ,large size: 117x37mm mini size: 85x37mm --power:2pcs cr2032 battery

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