This GPS antenna draws about 10mA and will give you an additional 28 dB of gain. It's got a 3-meter long cable so it will easily reach wherever you need it to. The antenna is magnetic so it will stick to the top of a car or truck (or any other steel structure). It comes with a standard SMA connector on the end. If you want to connect to our SIM808 GPRS GSM GPS Shield, be sure to pick up a uFL to SMA adapter!