Chip: CH340G32M version with Bluetooth and tts functionThe functions that the module can achieve:1. SMS send and receive: Provide management software to facilitate the sending and receiving of sms2. Telephone function: One instruction can get ATD100863. GPRS transmission data: Small amount of data transmission suitable for industrial use, such as wireless meter reading, weather monitoring, etc.4. Bluetooth transmission data (with high support): The Bluetooth standard is IEEE802.15, operates in the 2.4GHz band, and can be used for file transfer and data transmission with other Bluetooth devices.5. TTS voice synthesis (with high support): during the call, send text to the device, the device will convert the text into voice and output to the mobile phone end.colour:blueMaterial:Metal +pcSize: 27*50.7mmPackage Contents:1 x Serial GPRS SIM800C Module1 x AntennaOnly the above package content, other products are not included.Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.