Bluetooth GPS Pro+Includes: Bluetooth™ GPS + GLONASS Receiver with Barometric Sensor, USB File System Support and Streaming NMEA GPS Data OutputBe Adventurous - Explore the WorldThe original Bad Elf GPS Pro received rave reviews from the most demanding customers in military, commercial, andprivate aviation. The GPS Pro+, adds GLONASS satellite capability, USB file system access to data logs, and a barometric sensor for altitude. This GPS receiver, with 24 hour battery life when paired over Bluetooth/35 Hour Battery - Stand Alone Data Logger and the capacity to log a full week on the road just got better.Features:Instantly add GPS location support to your iPad Wi-Fi or iPod touch devices via Bluetooth Connect up to five device at onceView GPS+GLONASS status quickly with the backlit LCDAll day battery life - Pair Over Bluetooth - 24Hrs / Stand Alone Data Logger - 35HrsLog up to 200 hours of trip position data direct on your Bad ElfAccess your data logs directly from any PC or Mac using the included USB cable. GPS appears just like a USB thumb driveUSB connectivity to PC or Mac provides streaming NMEA GPS dataObtain altitude from GPS and from the built-in barometerHigh performance 66 channel GPS + GLONASS receiver that provides latitude, longitude, altitude, speed, and GPS trackAccurate to 2.5M (9') up to 60,000' and 1000 mphQuickly acquires satellite lock without cell tower assistance - Hot start time in as little as 2 secondsNo internet connection or monthly subscription requiredIPX4 water resistance makes this device ready for outdoorsBad Elf GPS provides location data to any and all apps that use Apple's iOS Core Location framework. Where To Use?AviationMarineVehicle NavigationGeocachingTravelRunningCyclingHikingStargazingRacingSpecifications:2.5M (9') positional accuracy with MTK chipset66 channel GPS & GLONASS receiverWAAS compatible, SBAS/EGNOSIMSAS supportUp to 10Hz sample rateLock times: 2s (hot). 1Ss (warm). 33s (cold)Size: 3.0" x 2.4" x 0.7" / 76mm x 61mm x 18mm (HWD)Weight: 3.2oz/91g - full package 6oz/170gMade For:iPod touch (1st, 2nd, 3rd, 4th, and 5th generation)iPhone SS, iPhone SC, iPhone 5, iPhone 4S, and iPhone 4iPad Air and iPad (1st, 2nd, 3rd, and 4th generation)iPad mini and iPad mini with Retina displayIn The Box:Bad Elf GPS Pro+ Data Logger3' (1M) mini-USB cable for chargingCar chargerUser guideDetachable lanyard