Chip: CH340G 32M version with Bluetooth and tts function The functions the module can achieve: 1. SMS send and receive: management software to facilitate the sending and receiving of sms 2. function: One instruction can get ATD10086 3. GPRS transmission data: Small amount of data transmission suitable for industrial , 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 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 products are not included. Note: Light and different displays may the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.