The motor carrier is responsible for checking that their device is sign uped, as established in 49 CFR 395.22. Motor carriers should only purchase an ELD that is certified by the manufacturer to be compliant and that is sign uped and listed on the FMCSA website.
The list of sign uped ELDs can be found at https://eld.fmcsa.dot.gov/List. Motor carriers should also familiarize themselves with the ELD checklist and the ELD rule. In the event that an ELD is removed from the registration list, FMCSA will place the removed device on FMCSA’s Revoked ELDs List.

To assure compliance, FMCSA’s testing processes included comprehensive testing of ELD4LSP as an electronic logging system, which was successfully accomplished. The system complies with 49 CFR Part 395 Subpart B, which requires accurate logging and delivery of hours of service data.

A driver using an ELD must have an ELD information packet onboard the CMV containing the following items:
a) A user’s manual for the driver describing how to operate the ELD;
b) An instruction sheet describing the data transfer mechanisms supported by the ELD and step-by-step instructions to produce and transfer the driver’s hours-of-service records to an authorized safety official;
c) An instruction sheet for the driver describing ELD malfunction reporting requirements and recordkeeping procedures during ELD malfunctions and a supply of blank driver’s record of duty status (RODS) graph-grids sufficient to record the driver’s duty status and other related information for a minimum of 8 days.
Note: A motor carrier must retain ELD RODS data and supporting documents for six months.

Yes, the required ELD manuals listed in 49 CFR 395.22(h) can be in digital format.