Check the listing for details. PiHat Raspberry Pi Ham Radio Push-To-Talk (PTT) Trigger/Isolator Module FULL KIT. Condition: New. Listed at 8.95 USD. Raspberry Pi to Ham Radio Push-To-Talk (PTT) Trigger/Isolator Module FULL KIT Model: HTX-PTT3-KIT (Rev A) Compatible: Yaesu, Kenwood, Icom, etc • PC Board has PRE-INSTALLED Optocoupler, LED, & RF Filtering Capacitor (and current-limiting resistors) • Easily and reliably connect any Raspberry Pi to your transceiver's PTT line, isolated by an opto-coupler • Terrific for FT8, JT65, FT4, JT9, PSK31, RTTY, SSTV, and more digital modes using WSJT-X or any other digital communications applications. • LED indicator when PTT active • RF Filter Capacitor (1nF) • Ground-Bridge Jumper • LED-Enable (Disable) Jumper • Standoff and mounting screw hole • In-board strain-relief hole • High-grade 2-layer PCB w/ solder-mask, beveled corner, and silk-screen • Overall board size: 11.5mm x 21.75mm Kit includes: PC Board with Optocoupler, LED, & RF Filtering Capacitor (and current-limiting resistors) 12-pin Female Header Connector (Raspberry Pi connector) -- Soldering Required2-pin Right-Angle 2.54mm Header Connector (PTT connector) -- Soldering Required2-conductor 35cm 2.54mm Wire Harness (to connect to Radio)Detailed Online Reference Manual (PDF) Photos of assembled board installed on a Raspberry Pi's are for Reference Only.