(1) transmit power, transmit power is greater than 40mW; (2) working voltage is wide, 1.8V-3.6V; (3) Operating frequency: 315 MHz; 433 MHz; (4) the use of PLL frequency stabilization (+ -50KHZ), frequency stability; (5) RXB8 receiver module with distances up to 500 meters; low (6) static power consumption, emission current consumption: 20mA, no data is basically no current consumption emission; (7) Working temperature: -40 ℃ ~ + 80 ℃; (8) Dimensions: 11x16x5.5MM; (9) Frequency stability: ± 50 KHZ; (10) modulation rate: 3KB / S; (11) Input signal: TTL level. Applications (1) car remote door switch (RKE); (2) remote control door opener, Barrier; (3) wireless security alarm; (4) remote control curtains; (5) wireless industrial controller; (6) Wireless data transmission.