The manual flash, which operates in Slave/Master modes, has a built-in radio synchronizer and a complete transmitter, and supports wireless synchronization functions. The set includes a stand for a flat surface. The flash is mounted using a standard twist-on mount on a hot shoe. The angle of inclination of the flash head in the vertical direction is 90°. The angle of inclination of the head in the horizontal direction with fixed steps is 270°.
There is a control panel on the case: on/off switch, test button, operating mode, flash power adjustment. Above the button block, there are mode and power indicators, a wireless connection indicator, and a flash channel switch. There is a retractable reflector that allows you to make artistic highlights in the eyes of the model. There are two connectors on the side of the flash: for synchronization and external power supply. On the other side there is a compartment for 4 AA batteries. The flash recharge time is about 0.1-5 seconds. The transmitter is powered by 12V 23A batteries. The leading number is 33 (m ISO 100). There are 8 power levels from 1/128 to full, depending on the photographer's needs.
The TT520II model can be either a master flash or a slave flash. The manual flash is suitable for operation in S1 and S2 modes. These modes are needed to synchronize with other flashes (slave mode). With S1, the flash is powered by the head flash, with S2, the flash is triggered by the second shutter. The M mode is used when the flash is the main light source, it can be on a hot shoe or on a stand.
