Features: Consists of a signal transmitter and a receiver trigger, operating via frequency-modulated wireless remote control. Utilizes advanced circuitry and components. Can transmit the coded FM wireless signal. Low power consumption, capable of standby mode for over a year on a single battery, continuously triggering thirty thousand times. Applicable to traditional or digital cameras with hot shoe or PC sync interface. Powered by dry batteries, ensuring safety, energy efficiency, and convenience. The product employs microcomputer control for decoding, offering superior anti-interference capabilities and sensitive reaction speed. Specifications: Model: PT-04 GY Outdoor Sync Speed (Open Area): Max 1/500 sec Indoor Sync Speed: Max 1/250 sec Outdoor Operating Distance (Open Area): > 30 M Receiver: Powered by 2 x AAA batteries (NOT INCLUDED) Transmitter Battery: 12V 23A Indoor Operating Distance: > 10 M Trigger Current: 0.01 MA Color: Black Sync Cable: 2.5 mm Camera Size: 105 x 30 x 42 mm Net Weight: 148.8 g Package Includes: 1 x 4-Channel Transmitter 3 x PT-04GY Receivers 1 x PC Sync Cable for Camera