[Frequency]：2.400~2.480GHz

[Protocol]：V4.2+V3.0 SPP

[Distance]：30m

[Size]：21*13mm

[Weight]：0.8±0.1g

[Feature]：Low power consumption，Dual-mode Bluetooth module

[Product weight]：0.8±0.1g

[Introduction]：E104-BT40 module is a serial to dual-mode ble slave module based on ble 4.2 + 3.0 version, namely low power consumption ble and classic ble SPP Profile, which can freely switch between ble and Classic ble, working at 2.4GHz.