Welcome to ETC Educational Technology Connection (HK) Ltd!
Bluetooth, wireless, rechargeable input
This block is alert. It senses how close you or objects are and can communicate that to other wireless blocks. Use it to count how many people have entered a room or set up an alarm.
Each wireless block has a Bluetooth chip and rechargeable battery inside it. Simply recharge your block with a Micro USB Charging Cable. Bluetooth Dongle for laptop and charging cables not included.