Welcome to the store! BL-M8821CS1 is compatible with various system platforms for development and transplantation Low cost, high performance High power, long range High universality, strong stability, high cost-effectiveness Suitable for set-top boxes, projectors, IPC cameras, tablets, driving recorders, TVs Module Name: BL-M8821CS1 WLAN + BT4.2 SDIO Module Chipset: RTL8821CS Operating Frequencies: 2.4-2.4835 GHz or 5.15-5.85 GHz WIFI Standards: IEEE802.11a/b/g/ac Host Interface: SDIO 1.1/2.0/3.0 Antenna: Connect to the external antenna through a half-hole Power Supply: 3.3V ± 0.2V Operating Temperature: -20℃ to +70℃ Operating Humidity: 10% to 95% RH (non-condensing) Color: As shown Material: PCB Package Contents: 1 * Wireless Module 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 to differ slightly from the real item. The allowed measurement error is +/- 1-3 cm. Your satisfaction is our top priority. We will provide you with the best service. If you find any problems after receiving the product, such as damage, incorrect quantity, etc., please contact us immediately and we will provide you with the best solution!