Chip: CH340G 32M version with Bluetooth and tts function The functions that the module can achieve: 1. SMS send and receive: Provide management software to facilitate the sending and receiving of sms 2. Telephone function: One instruction can get ATD10086 3. GPRS mission data: Small amount of data mission suitable for industrial use, such as wireless meter reading, weather monitoring, etc. 4. Bluetooth mission data (with high support): The Bluetooth standard is IEEE802.15, operates in the 2.4GHz band, and can be used for file fer and data mission with other Bluetooth devices. 5. TTS voice synthesis (with high support): during the call, send text to the device, the device convert the text into voice and output to the mobile phone end. colour:blue Material:Metal +pc Size: 27*50.7mm Package Contents: 1 x Serial GPRS SIM800C Module 1 x Antenna Only 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.