Features: The 4G module type is hp- LT4120 T77W595. The 4G module supports 4g lte fdd frequency band 2/4/5/13/17/25. Hp- original part number SPS: 800870-001 PN: 796927-001 Support Hp-Probook/EliteBook 840 850 G2 82 J2W1. Widely and dedicated used in hp- notebooks: EliteBook 840 G3 Notebook PC/ 850 G3 Notebook PC /ZBook 15u G3 Mobile Workstation/ 745 G3 Notebook PC/ 755 G3 Notebook PC/ 820 G3 Notebook PC/ 828 G3 Notebook PC/ G2 Notebook PC/ 650 G2 Notebook PC/ 645 G2 Notebook PC/ 655 G2 Notebook PC / EliteBook 725 G3 Notebook PC/ Spectre- x2 Detachable Convertible/ Elite x2 1012 G1 Tablet/ Elite x2 1012 G1 with Travel Keyboard /Elite x2 1012 G1 Advanced Keyboard Specifications: Category: 4G Module Chipset: MDM9625 for Qualcomm Form Factor: PCIe for M.2 Size:approx 4x3/1.57x1.18in According to official information, the following hp- models can be supported: EliteBook 840 G3 Notebook PC EliteBook 850 G3 Notebook PC ZBook 15u G3 Mobile Workstation EliteBook 745 G3 Notebook PC EliteBook 755 G3 Notebook PC EliteBook 820 G3 Notebook PC EliteBook 828 G3 Notebook PC ProBook 640 G2 Notebook PC ProBook 650 G2 Notebook PC ProBook 645 G2 Notebook PC ProBook 655 G2 Notebook PC EliteBook 725 G3 Notebook PC Spectre- x2 Detachable Convertible Elite x2 1012 G1 Tablet Elite x2 1012 G1 with Travel Keyboard Elite x2 1012 G1 Advanced Keyboard Package Includes: 1 x 4G T77W595 Card note: Due to the problems of lighting effects and shooting angles, there will be certain tolerances in the product, please understand. Please allow 0-1cm error due to the manual measurment.