Wireless

US$22.75
This Bluetooth device is the HM-10 Module that is rated for Bluetooth 4.0, it comes with a logic level converter so you can plug your Arduino Uno to this device, but you need a USB to TTL Converter to do so! The device comes heatsinked in transparent heat shrink to protect the device from ESD.
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US$13.93
This device adds Bluetooth connectivity to your RPi, Laptop, Desktop or any other related project that has a USB port. A simple plug and play device that was tested for windows 10.
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US$13.93
Add Bluetooth connectivity to your project! Operates from 3.6v to 6v, which means you can use interface this simple device to any micro controllers.  The added simplicity of the four pre-soldered connectors results in a very easy n' quick plug and play for any future projects.
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US$13.93
Add Bluetooth connectivity to your project! Operates from 3.6v to 6v, which means you can use interface this simple device to any micro controllers.  The added simplicity of the four pre-soldered connectors results in a very easy n' quick plug and play for any future projects. Comes pre-soldered with six pins only need VCC - RX - TX & GND to get it operational.
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US$26.87
Features: 4 Relay Module w/2 Remote Controls. Remotely control up to 4 devices up to 200 meters away. Four 10 Amp relays rated at 125VAC with two separate remotes. Extremely easy to set up and use. Perfect for domestic applications such as remote lighting and appliance control, up down control for motorized window shades, electric door entrance access, etc.
Delivery within 2-3 weeks
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US$28.75
GPS Receiver for Arduino is a unit embedding GPS module and antenna in a small foot-print enclosure. By using TinyGPS library, Arduino can retrieve geographic coordinates (latitude and longitude, altitude), speed, heading and GMT time.
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US$8.67

Wow that's a tiny GPS antenna! This passive antenna is only 9mm x 9mm x 6.5mm in size, with a 50mm long uFL cable. Great for when you want to keep things small. Comes with a standard uFL connector on the end.

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US$30.00
This is designed for the XBee module configuration parameters to facilitate using or to work as a FTDI writer. The new version of Xbee USB adapter is also welded with the female pin for FTDI so that users can directly use the adapter as a FTDI program writer, such as Arduino FIO/pro/mini、lilypad Arduino and so on.
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US$6.03
At just 75mm long from tip to tip and and with a thickness of just 2mm, this 3dBi GSM antenna is slim, compact and sensitive, with a 3dBi gain.
Delivery within 2-3 weeks
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US$39.05
This is a simple to use, USB to serial base unit for the Digi XBee line. This unit works with all XBee modules including the Series 1 and Series 2.5, standard and Pro version. Plug the unit into the XBee Explorer, attach a mini USB cable, and you will have direct access to the serial and programming pins on the XBee unit.
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US$8.67
This 2.4"/61mm long antenna has 2dBi of gain and 50Ω impedance so it will work fantastically with just about any 850/900/1800/1900/2100 wireless receiver/transmitter such as any Cellular or GSM/GPRS device.
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US$9.87
This 2.2"/57mm long antenna has 2dBi of gain and 50Ω impedance so it will work fantastically with just about any 850/900/1800/1900/2100 wireless receiver/transmitter such as any Cellular or GSM/GPRS device.
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US$7.53
This is a basic SMA (Sub-Miniature A) male to female connector cable. Each cable is 25cm (9.8") long and has a 50Ω impedance that can handle frequencies up to 17 GHz. 
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US$39.05
With the XBee Explorer Dongle you can plug the unit directly into your USB port and have it act as a gateway between your computer and the XBee. No cables needed! This unit works with all XBee modules including the Series 1 and Series 2.5, standard and Pro version. The on-board voltage regulator is good up to 500mA.
Delivery within 2-3 weeks
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US$9.73

This is a great inexpensive option for wireless communication; it's an ISM band FSK transceiver module implemented with a unique PLL. These modules operate in the 434MHZ band and fully comply with FCC and ETSI regulations.

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