Composed of a 4-in-1 system: 433MHz RF module + ESP32S2 Predator module + GPS module + 2.8-inch Predator screen. The GPS module is compatible with both the Zero and 2.8-inch Predator screens; power supply is optional. The RF module can be accessed via the sub-GHz menu and used directly as an external module. The S2 module can be used in the GPIO menu of the app under the WiFi Predator feature. The S2 module uses pins 15 and 16 of the Zero module, and each signal pin has a TVS sensor. Product Specifications: Battery Capacity: 800mAh Antenna Specifications: 2.4GHz uses a 3dBi antenna, GPS uses a 20dBi antenna, and the 433MHz uses a 3dBi antenna. Caution: Strictly prohibited for illegal use. Battery Capacity: 800mAh Antenna Specifications: 2.4GHz uses a 3dBi antenna, GPS uses a 20dBi antenna, and the 433MHz uses a 3dBi antenna. Caution: Strictly prohibited for illegal use. Color: White Material: ABS Package Contents: 1*2.4G Expansion Board for Zero Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.