The EE-108 is an American portable telephone manufactured in 1940. This hand-cracked telephone magneto was operated by rotating the handle. The device worked without the use of batteries, according to the principle developed by Alexander Bell back in 1876: he used the linear electromotive force generated by the electromagnetic cap of the telephone receiver. At the same time, the apparatus could also be plugged into a common battery commutator. In this case, the call was made by picking up the receiver.

As it did not need any power supplies, the device was light and small, weighing 3.8 kg. For convenient use in the field, the device was complemented with a hard leather case with a leather shoulder strap. The top flap was lifted, revealing the interior divided into halves. Inside, the telephone itself was located on the right in a rectangular black case with numerous terminals, on the left was the receiver, connected to three terminals.

The TS-10 telephone handset had two electromagnetic caps, similar in design to the reversible cap of the Soviet “TABIP” — a telephone set that operated without a power supply. One of the caps is labeled in English as Transmitter M, the other — as Receiver T. The PTT switch was made in the form of a recessed round brass button.

The EE-108 was produced during the Second World War. Presumably, the device was designed specifically for the Red Army specification requirements and was imported to the USSR under the Lend-Lease. This telephone was considered one of the most common in the Soviet communication troops. The American manufacturing company produced devices with inscriptions in Russian for deliveries to the USSR.

The telephone was used mainly on the front line for communication over short distances between platoons and company commanders, as well as between companies and battalion commanders. The telephone signal covered a distance of up to 15 km.