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. It targets M2M applications including utility metering, transportation, security and environmental monitoring.
Key specifications include dual‑band operation (800 MHz and 1900 MHz), CDMA2000 1x/EV‑DO protocols, USB Type‑B data interface, DC5‑25 V power supply, operating temperature from –10 °C to +55 °C, dimensions of 100 mm × 70 mm × 20 mm and a weight of 200 g. This manual is written in Chinese.
| Frequency Bands (800 MHz) | Send 824‑849 MHz, Receive 869‑894 MHz |
|---|---|
| Frequency Bands (1900 MHz) | Send 1850‑1910 MHz, Receive 1930‑1990 MHz |
| Output Power | 1 W @ -75 dBm |
| Power Supply Voltage | DC5 V‑25 V |
| Operating Temperature | -10 °C to +55 °C |
| Dimensions | 100 mm × 70 mm × 20 mm |
| Weight | 200 g |
| Warranty | 1 Year |
The modem operates from a DC supply of 5 V to 25 V.
The device measures 100 mm × 70 mm × 20 mm and weighs about 200 g.
The modem comes with a 1‑year warranty.