Chip: CH340G 32M version with Bluetooth and tts function The functions that the module can achieve: 1. SMS send and receive: management software to facilitate the sending and receiving of sms 2. Telephone function: One instruction can ATD10086 3. 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 and data transmission with other Bluetooth devices. 5. TTS voice synthesis (with high support): during the call, send to the device, the device will convert the 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 are not included. Note: Light and different displays may cause the color of the item in the a little different from the real . The measurement allowed error is +/- 1-3cm.