RF-BM-S01 BLE module applies CC2540 from TI as core processor. The module runs at 2.4GHz ISM band, with GFSK (Gaussian Frequency Shift Keying) modulation scheme. It has 40 channels(channel space at 2MHz), among which there are 3 fixed radio channels and 37 data channels of adaptive automatic frequency hopping. Physical layers can be combined with classic Bluetooth RF to form a dual mode device. And 2 MHz’s channel space can prevent interference from adjacent channels better. Besides, it has a wide output power adjustment (-23 dBm ~ 4dBm) and a high gain receiving sensitivity of -93 dBm.