[IC]：RTL8760ATT

[Frequency]：2402~2480MHz

[Protocol]：V2.1

[Distance]：50m

[Size]：25*13mm

[Weight]：1.2±0.1g

[Introduction]：E104-BT20 Bluetooth serial communication module is a data transmission module based on Bluetooth Specification V2.1 BR / EDR Bluetooth protocol.The working frequency is 2.4GHz ISM, and the modulation method is GFSK. The module's maximum transmission power is 3dBm.