This is the receiver module found inside the GPS5 (no case or DB-9 cable). Works at altitudes up to 18KM. It weighes 0.5oz, comes with a 3" interface cable and outputs both TTL and RS-232. Wiring is 1:black:ground, 2:red:3.3V to 5V DC power, 3:yellow:TTL data from GPS, 4:white:RS-232 data to GPS, 5:green:RS-232 data from GPS, 6:blue:TTL data to GPS. Size is 30mm x 30mm x 7.8mm. Weight with cable 15g / 0.5 oz. Intended for high altitude ballooning. Works at altitudes up to 84KM.