The CH-M2C3H2 EV-DO Modem is a compact, metal‑cased device designed for low‑data‑rate communications such as SMS, CSD and packet data in M2M applications like utility metering, logistics, security and transportation. It offers standard SIM, USB and antenna interfaces for easy integration.
Key specifications include dual‑band operation (800 MHz and 1900 MHz), low power consumption (DC 5‑25 V), 1 W output power, USB Type‑B data port, SMA antenna connector, and a rugged form factor measuring 100 mm × 70 mm × 20 mm and weighing 200 g. This manual is written in Chinese.