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... Open area signal range 1500m Waterproof Totally waterproof Key name Call/cancel Weight 100g Wireless alarm light : 3 working modes: Related Product Wide Market School Calling System Students call different ...
... temperature -20C-80C Store temperature -40C-80C Case material ABS material Wide Market School Calling System Students call different kind of assistance by press the transmitter. For example, press the butto...
... larger, safe and convenient. Commuting to work: professional and capable, able to accommodate computers, tablets, laptops, and lunch. Campus learning: lightweight, able to hold books, and stylish, meeting s...
... larger, safe and convenient. Commuting to work: professional and capable, able to accommodate computers, tablets, laptops, and lunch. Campus learning: lightweight, able to hold books, and stylish, meeting s...