Thank you for purchasing DM-16 Studio Flash Trigger. The device is composed of two parts, namely signal transmitter and receiver. It is a control discreteness for camera to trigger studio flash synchronously. Features: Wireless remote control system, convenient to operate, ultra-low voltage, battery saver. The transmitter is equipped with and advanced electric circuit. Circuit design with sleepy function, low power consumption. The receiver is used with altermating current, and it achieves quick response under the advanced MCU control. It can meet the need of sync flash for any different shutter camera. Specifications: Model: DM-16 Channel: 16 Transmit Frequency: 433MHz wireless remote system Transmitter Power: 12V 23A battery Receiver Power: AC: 100-240V; 50/60Hz PC Cord Jack: 6.35mm / 3.5mm Outdoor Operation Distance: 30m (Open space) Indoor Operation Distance: 20m (Open space) Synchronizing Speed: 1/200s Transmitter Dimension: 7.2 * 4 * 3.3cm Receiver Dimension: 7.2 * 5.9 * 3.4cm Package Size: 8.5 * 4.2 * 25.5cm / 3.3 * 1.7 * 10in Package Weight: Approx. 217g / 7.7oz Package List: 1 * Transmitter 1 * Receiver 1 * Convert Adapter 1 * User Manual(English) User Guide: 1. Attach the transmitter onto your camera hot shoe; 2. Plug the receiver's cable terminals into flash strobe power socket & AC power socket seperately; 3. Set the same channels; 4. Turn on the power for instant using.