From Halopedia, the Halo wiki
EMG is a human company that manufactures electrical devices such as the EMG 2401.
- The number 2401 is a 7 reference: 2+4+0+1=7. Another reference could be 2401 = 7^4.
- 2401 is also the number of the Monitor of Installation 05, 2401 Penitent Tangent.