forum<\/a> for support or to ask a question.<\/div>\r\n\r\n*<\/b> In many parts of the world, using extremely low-power transmitters in the FM band for non-commercial purposes requires no license but you should always check the local laws just in case! You are responsible for complying with local RF transmission regulations.<\/b><\/div>\n\n**Includes:**\n\n* Qwiic FM Transceiver Board\n\n**Features:**\n\n* Uses I\u00b2C interface (Qwiic-enabled)\r\n* Transmit and receive stereo audio in the FM band!\r\n* Transmit and receive RDS\/RBDS text strings\r\n* 2 jumper-selectable I\u00b2C addresses: \r\n * **0x11 (default)**\r\n * 0x63 (jumper cut)\r\n* On-board TPA6111 Headphone Amplifier\r\n* 3.5mm audio jacks for line-level input and headphone output\r\n* 2-position poke-home connector for Rx\/Tx Antenna and RF Ground\r\n* Operating voltage range\r\n * 3.3V to 5.5V\r\n * Typically 3.3V<\/b> if using the Qwiic cable\n\n**Documents:**\n\n* [Schematic](https:\/\/cdn.sparkfun.com\/assets\/6\/e\/b\/c\/1\/Qwiic_FM_Transceiver_Si4721.pdf)\r\n* [Eagle Files](https:\/\/cdn.sparkfun.com\/assets\/3\/5\/7\/c\/8\/Qwiic_FM_Transceiver_Si4721.zip)\r\n* [GitHub Hardware Repo](https:\/\/github.com\/sparkfun\/Qwiic_FM_Transceiver_Si4721)\r\n* [Si4720\/21 Datasheet](https:\/\/cdn.sparkfun.com\/assets\/7\/7\/e\/8\/1\/Si4720-21-B20.pdf)\r\n* [TPA6111 Datasheet](https:\/\/cdn.sparkfun.com\/assets\/6\/e\/6\/a\/d\/tpa6111a2.pdf)\r\n* [Arduino Library](https:\/\/github.com\/mathertel\/Radio)\n\n","date_published":"2019-12-11 12:38:12.016439-07","price":22.48,"qty_price":{"1":22.48},"in_stock":false,"backorder_allowed":false,"is_rohs_compliant":true,"is_export_controlled":false,"is_oshw":true,"in_eagle_library":false,"in_fritzing_library":false,"sparkfun_original":false,"hstariff":"8542.39.0000","pack_length":"70mm","pack_width":"50mm","pack_height":"8mm","packed_weight":"0.0220lbs","ascii_art":"\n\n\n\n\n\n\n\n\n\n\n\n .,;;;,\n .oxOkd: cO0Okd.....',,,;,\n ....',;xkkOko,:;:okOkoc;xOo'ockKKx. :x\n ....'',;;:;'c;:coloodOx0kOX0kxlc':OO'.:xX:cdlc'.dkl,ocoKKx..oO\n 'k:..dKKXXXo,dkxkkkxdxkkxol0koddo:ckk:lx0NXXXKKkdxxl'oKKKKKK0KK.\n .d :KXXXXKx0k0kkkkkkkkk0NNNWNX0xkxk:,kXNWWNXXOkkxoclKKKKKKkkO.\n 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