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When the child is studying or having class, wear this device on his neck. The reminder will beep lightly or vibrate to remind him if he is not sitting in right posture, this model has a vibrate function; the child can use this when he is attending the class. Once the child is not sitting rightly, or sleepy, it will vibrate to remind him.
Use this product, there will be less short sight students, and their study will be better.
Transmitter:5.6X5.0X1.4CM
Battery: 1X CR2032 (included)
Stationery