SIM800L GPRS switchboard GSM module microSIM card minimum/cheap

reference: //pan.baidu.com/s/1NTXNqIXS4MxlMhSoYrKzyA

product description:

• there is no welding pin in stock, and more expansion space is reserved for customers
• module model: SIM800L (latest module, performance exceeds SIM900/M590)
• working voltage: 3.7~4.2V (peak current 1A, please handle it well)
• supported networks: China Mobile, China Unicom and Global four-band network
• module size: 2.5cmx2.3cm
• the serial port is TTL serial port, which can be directly linked with SCM. Don't need MAX232
• the module is automatically powered on, and the network is automatically searched
• on-board one-way signal indicator light (with slow signal flash, no fast signal Flash)
• the smallest size in the world, there is no GSM module smaller than this module
• all machine patch processing, reflux welding, stable performance

taken in kind: