Standard 25x25x4mm high sensitivity GPS antenna with UART/TTL and optional 232 interface. 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 update rates from 1 to 10Hz. Compatible with AssistNow Online and AssistNow Offline services. Supports GPS, GLONASS, and SBAS (WAAS, EGNOS, MSAS, GAGAN) via Hybrid Engine Chip UBX-G7020-KT. Uses C/A code at 1.023MHz. Receives on L1 frequency (1575.42MHz). 56-channel receiver. S11 SWR: ≤1.3, impedance: 50 Ohm ±5%. S21 gain: ≥20.0dB. S22 SWR: ≤1.3. Position accuracy: <2.5m (autonomous, 50%), <2m with SBAS. Velocity accuracy: <0.1m/s. Heading accuracy: <0.5 degrees. Timing accuracy: 30ns. Reference coordinate system: WGS-84. Maximum altitude: 50,000 meters. Maximum acceleration: <4g. Tracking sensitivity: -162dBm. Acquisition sensitivity: -160dBm. Cold start time: 29s average. Warm start time: 28s average. Hot start time: 1s average. AGPS acquisition time: 3s. Color: Green. Material: ABS + metal. Package includes: 1 x GPS module, 1 x cable. Light and display differences may cause slight color variation between image and actual item. Measurement tolerance: ±1-3cm.