AK-G9 GPS receiver can take pictures while recording the "geotag" in your photos EXIF information, including latitude, longitude, altitude, direction, and time information; For those traveling myself, such as outdoor photographers, nature photography enthusiasts, climbers, sports enthusiasts, news reporters, ombudsmen, real estate brokers, this device provides a simple solution, no matter when and where are accurately recorded on your photographs; Built-in electronic compass, photo EXIF orientation information can be recorded lens (most other GPS do not have); Fast satellite acquisition; Energy-saving automatic sleep mode (automatically enters sleep mode when not taking pictures); In recording the last known GPS position automatically records when used indoors in the photo; On / off switch; With shutter line interface; Data Retention: longitude, latitude, altitude, direction, and time information; Update rate: once per second; Acquisition of satellite required time: 30s (cold starting in open field), 3s (hot starting in open field); GPS accuracy: 5m; Average working consumption: 60mA; Average power consumption under sleepy mode: 2mA; Working temperature: 0'C~40'C; Especially designed for Nikon D90