The nRF24L01+ is a 2.4GHz ISM band transceiver; Auto-acknowledge and auto-retransmit abilities
Range: 800+ meters line of sight, Weight: 13.28 g (0.468 oz)
The module has 5V tolerant inputs which allows for direct connection of SPI pins to the Arduino.
More detail:http: //www.nordicsemi.com/kor/Products/2.4GHz-RF/nRF24L01P
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Technical Details

Product Details

Product Dimensions

Package Dimensions
Width : 3.5 inch
Height : 0.9 inch
Length : 3.8 inch

Item Weight: 0.64 ounce (View shipping rates and policies)
Shipping Weight: 2.08 ounce (View shipping rates and policies)

ASIN : B01IK78PQA