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 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 convert the text into voice and output to the mobile phone end. Chip: CH340G 32M version with Bluetooth and tts function Color:blue Material:PCB Size: 27 * 50.7mm Package Contents: 1 * module 1 * antenna Only the above package content, other products are not included. Note: Light reflection 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.