Features: Networking Card Expansion: Provides For RPi Board with 3G/4G/LTE networking connection for easy networking access and data transfer anywhere. Adapter card: Easy-to-use adapter card for easy installation and operates. Strong compatibility: Suitable for many models For RPi Board expansion card, compatibles mainstream 3G/4G/LTE networking cards. Stable Connection: Stable networking connection, supports fast speed data transmission and stable networking communication. For those who need For RPi Board for remote monitoring or data transmission Specifications: Size：about 84x56x24mm/3.31x2.2x0.94in For 3G/4G/LTE Networking Connection Module For RPi Board Board Package Includes: 1Set Networking Card Expansion Card note: Due to the problem of lighting effects there is certain tolerances in product, please understand. Please allow 0-1cm error due to the measurement.