Features: 1. New and high quality 2. Made of high-quality material, durable and wear-resistant 3. Nice replacement for broken or old one, helps your device work properly 4. High quality for professional use 5. Requires a professional to install the corresponding accessories to avoid damage Specifications: 1. Module Model: SIM800L 2. Working Voltage: 3.7~4.2V (Peak Current 1A, handle with care) 3. Support Network: Quad-Band Network 4. The serial port is a TTL serial port and can be directly linked to the microcontroller 5. The module automatically starts up when powered on and automatically searches for networks 6. Onboard one signal indicator light (slow flashing when signal is present, fast flashing when no signal is present) 7. Small size; compact design 8. Full machine patch processing, reflow soldering, stable performance 9. Power supply can be directly powered by lithium batteries Material: PCB Color: As shown Package Contents: 1 x Adapter Board Module (with cable) 1 x SIM800L Module 1 x Spring Antenna 2 x Pin Header Note: Light reflection and different displays may cause the color of the item in the picture to vary slightly from the real thing. Measurement allowed error is +/- 1-3 cm.