Features: Positioning module double protocol provides more stable navigation and flight control. FPV return rescuation function ensures flight safety. High performances flight control positioning, F4 F7 H7 processor, more precise flight control. Fixed wing aircraft design, suitable for long-distance flight and aerial photography missions. Support FPV real-time video transmission, providing an immersive flight experience. Specifications: Material: ABS+Metal Type: BZ121, BZ181, BZ251(optional) BZ121: about 12x16x4mm/0.47x0.62x0.15" BZ181: about 17x17x7mm/0.66x0.66x0.27" BZ251: about 24x24x7mm/0.94x0.94x0.27" Cable length: about 15.5cm/6.10", 14.3cm/5.62" Chip: M10 (ten generation chip) Power:5V Antenna: ceramic antenna Receiving channels: 72 search channels Output frequency: 1Hz-10Hz. Default 10Hz Speed accuracy:0.05m/s Horizontal positioning accuracy: 2DACC1.5m(open air) Receiving sensitivity: traced -162dBm Capture: -160dBm Dynamic characteristics: Altitude:50000m Speed:500m/s Acceleration:4G Operating temperature:-40°C-+85°C Storage temperature:-40°C-+105°C BZ251 Positioning Baud rate:115200dps, Compass:QMC5883 BZ181 Positioning Baud rate:9600dps BZ121 Positioning Baud rate:115200 Package Includes: 1x Positioning Module with Cable Set note: Please allow 1-2cm errors due to manual measurement. Please allow for slight color differences due to different display resolution.