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![[high-price] BC04-B BT Bluetooth Transceiver Module](https://www.electrodragon.com/wp-content/uploads/2012/01/bc04-1-400x400.jpg)
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RF-LINKWireless RF Link, PT2262 & PT2272 Encoder Decoder
$3.00cheap, easy to use, receive and send module in ISM 433 MHz, and also work with arduino!
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2.4GHzNRF24L01 2.4G Wireless Module, Genuine Chip
$2.90RF24L01B low power wireless module, use NRF24L01 chip from Nordic, 2.4G lisence-free ISM band, highest working data speed is 2Mbps,
