1、Working frequency is 433MHz, the maximum synchronization speed is up to 1/250s, and the maximum working distance is 30 meters. It is suitable for 360‑degree professional shooting in different environments. 2、Adopts AC power supply, durable, equipped with a conversion head, freely switchable between 6.5mm and 5mm plugs, which expands the scope of use and is convenient for more studio flashes. 3、Strong compatibility, the transmitter adopts a single contact design, which is widely used in for Canon, for Nikon, for Sony and other cameras. 4、4‑channel design, strong anti‑interference ability. A good and wise choice you should make. 5、Easy to use, without any difficult requirements even though you use it for the first time. 1 x Transmitter1 x Receiver1 x Adapter 1 x Flashing Wire1 x Manual  Item Type: Flash TriggerMaterial: PlasticWeight: Approx. 138g / 4.9ozTransmitter Battery: Built-in 23A-12V Battery 50mAh (Shipped with Built-in Battery)Receiver Power Supply: AC110-240VChannel: 4Working Distance: 30m (Maximum)Working Frequency: 433MhzSynchronization Speed: 1/250sConversion Plug: 3.5mm To 6.5mm AdapterScope of Application: Studio Flashes of Different Brands