New 2.4ghz 2db Vertical Wi-fi Lan Booster Antenna for Arduino DIY Arduino 2.4GHz 2DB vertical Wi-Fi lan booster antenna Complaint with SPI module nRF24L01 + PA + LNA v3.1 Fit for IEEE 802.11b and 802.11g wireless LANs, Wireless router; 90 degree adjustable; Antenna length 11cm/4.3" (Unbent), 8cm/3.2" (Bent)