GR-212 is waterproof & low power consumption GPS Receiver. It is using SiRF Xtrac Version 2 firmware which has extra high sensitivity. GR-212 support NMEA 0183 v2.2 data protocol and compatible with most GPS software. Holux GR-212 Xtrac Waterproof GPS (Bundle with USB cable for PC) Holux GR-212 Xtrac Waterproof GPS (Bundle with Serial Cable for PC) Holux GR-212 Xtrac Waterproof GPS (Bundle with cable for Palm Tungsten C, W, T, T2, T3, m100, m500 series, i705, Zire 71) Holux GR-212 Xtrac Waterproof GPS (Bundle with cable for Palm Tungsten E and Zire 31) Holux GR-212 Xtrac Waterproof GPS (Bundle with cable for Treo 600 Smartphone Cable) Holux GR-212 Xtrac Waterproof GPS (Bundle with cable for Palm T5/Treo650) Holux GR-212 Xtrac Waterproof GPS (Bundle with cable for Dell Axim X3 / X3i / X30) Holux GR-212 Xtrac Waterproof GPS (Bundle with cable for Dell Axim X5) Holux GR-212 Xtrac Waterproof GPS (Bundle with cable for Dell Axim X50 / X50v) Holux GR-212 Xtrac Waterproof GPS (Bundle with cable for Sony Clie T, ST, SJ, NX & TJ Series) Holux GR-212 Xtrac Waterproof GPS (Bundle with cable for Sony Clie N, NR & NZ Series) Holux GR-212 Xtrac Waterproof GPS (Bundle with cable for iPAQ 22xx/38xx/39xx/54xx/55xx) Holux GR-212 Xtrac Waterproof GPS (Bundle with cable for iPAQ 36xx / 37xx) Holux GR-212 Xtrac Waterproof GPS (Bundle with cable for Toshiba E-740 & 330 Series)