(via https://www.youtube.com/watch?v=BL3wj2wYQs4)
Tutorial: Overview of XBee 1mW S1 Wire Antenna Series 1 Module
ISM 2.4 GHz operating frequency
1 mW or 0 dBm power output
Industrial temperature rating -40° C to 85° C
Indoor/Urban range: up to 100 ft/30 m
Outdoor/RF line-of-sight range: up to 300 ft/100m
Interface data rate: Up to 115.2 Kbps
Receive current: 50 mA @ 3.3 V
Transmit current: 45mA @3.3V
Power-down sleep current: less than 10 µA
Supply voltage: 2.8 - 3.4V
2mm pitch to pitch DIP pin
Dimension: 2.438cm x 2.761cm
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http://www.aliexpress.com/wholesale?catId=0&initiative_id=SB_20160827213421&SearchText=xbee+s1
http://www.ebay.com/sch/i.html?_from=R40&_trksid=p2047675.m570.l1313.TR0.TRC0.H0.Xxbee+s1+.TRS0&_nkw=xbee+s1+&_sacat=0
https://www.sparkfun.com/products/8665
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Youtube Channel: https://www.youtube.com/channel/UCcod-yed5XuUYctUc2zC-PA