Standard 25x25x4mm high sensitivity GPS antenna with UART/TTL interface, 232 optional. Features KDS 0.5 PPM high precision TCXO, built-in SQI flash, crystal, and picofarad capacitance. Faster hot start with built-in LNA (low-noise amplifier). Supports 1-10Hz update rate. Compatible with AssistNow Online and AssistNow Offline services. Supports GPS, GLONASS, and SBAS (WAAS, EGNOS, MSAS, GAGAN) hybrid positioning engine. Chip: UBX-G7020-KT. C/A code, 1.023 MHz. Receive frequency: L1 (1575.42 MHz). 56-channel receiver. S11 SWR: ≤1.3. Impedance: 50 Ohm ±5%. S21 gain: ≥20.0 dB. S22 SWR: ≤1.3. Position accuracy: <2.5m (autonomous, 50%), <2m (SBAS). Velocity accuracy: <0.1m/s. Heading accuracy: <0.5 degrees. Timing accuracy: 30ns. Reference coordinate system: WGS-84. Maximum altitude: 50,000 m. Acceleration: <4g. Tracking sensitivity: -162dBm. Acquisition sensitivity: -160dBm. Cold start time: 29s (average). Warm start time: 28s (average). Hot start time: 1s (average). AGPS time: 3s. Color: Green. Material: ABS + metal. Package includes: 1 x GPS module, 1 x cable. Note: Light and display differences may cause slight color variation between image and actual item. Measurement error allowed: +/- 1-3cm.