BT-Q1300S: Qstarz BT-Q1300S Nano Keychain Bluetooth GPS Data Logger (66 ch MTK, 200K waypoints, Dual Bluetooth/USB, Armband, Qsport Software) Time to First Fix (TTFF) : &lt; Average 1/33/35 sec. (Hot/Warm/Cold start) Antenna : Built-in patch antenna with LNA Output Message : NMEA-0183 (V3.01) - GGA, GSA,GSV, RMC(default); VTG, GLL(Optional) Accuracy : &lt; 3m CEP (Stand-Alone, S/A off); &lt; 2.5m CEP (DGPS) Sensitivity: -165dBm tracking