Features include: MTK32 high performance and low power consumption chipset Communication with Host platform Via Bluetooth Serial Port Profile Built-in ceramic patch antenna Superior sensitivity for urban canyo and foliage environment 3 LED to show the rechargeable Li-ion battery Operation time: up to 25 hours, in continuous mode Bluetooth operation range: up to 15 Metres Specifications: Chipset: MTK 32 Channel Frequency:L1, 1575.42 MHz C/A code:1.023 MHz chip rate Channels:32 channel all-in-view tracking Antenna Type:Built-in Ceramic patch antenna Position:3 meters, 2D RMS Velocity:0.1 m/s Time:1 us synchronized to GPS time Default:WGS-84 Acquisition Time (Open sky, stationary) Reacquisition:0.1 sec., average Hot start:1 sec., average Warm start:36 sec., average Cold start:39 sec., average Altitude:18,000 meters (60,000 feet) max. Velocity:515 meters/second (1000 knots) max. Acceleration:Less than 4g Jerk:20 m/sec3 Voltage: Rechargeable and removable battery with 5V DC input charging circuit Operation Time: Default 25 hours after fully recharged, in continuous mode Trickle power mode Connection: Communication with host platform via Bluetooth Serial Port Profile Protocol messages: NMEA-0183 output protocol Output format: GGA(1sec), GSA(5sec), GSV(5sec), RMC(1sec),VTG(1sec) Operating temperature: -20 ° to 60 ° C Humidity: 5% to 95% Non-condensing Applications: For car navigation, marine navigation, fleet management, AVL, personal navigation, tracking system and mapping devices.