Hello Guys, Now we have some new modules based on nRF24L01, which add a power amplifier circuit and  could transmit longer distance. If you need more powerful RF sending capability,  this series of modules  may be your best choice. 2.4G Wireless nRF24L01 + PA + Module ,the module on the open area, with 5DB Antenna can be up to 300 meters. 2.4G Wireless nRF24L01P+ PA + LAN + Module, the module based on nRF24L01+ which has three data rate mode  2MHz/1MHz/250KHz???with 2DB Antenna and  data rate at 250kbps and work of band 2.4GHz, the transmission distance can be up to 1000 meters in the open area. If you need more products about RF, Please get in touch with us, Thanks.