Fireworks Firing SystemDE Series firing system worked by 220V/110V AC. It has the “test”function. Each channel could fire about 20pcs igniters. This series firing system could “salvo fire”,” sequential fire”and “step by step fire”. Time range is from 0.1-9.9s. It can be remote and manual control. Salvo fire & Sequential fire 1. Salvo: The time table shows: 9.9s when the power was ready. After you press button”time”one time, the time table will change to 0.0s. Pls press”salvo”button now. 2. Sequential: Once you press the “time” button one time, the sequential time will add 0.1s. When it is adjust to the time that you need , pls press “rapid” button , it will make firing system sequential fire. If you need reset sequential time, pls cut off the power for about 2 seconds. 3. Step fire: Pls make sure that the time table shows 0:0. Then pls press “step” button or “1.2.3”button one by one. Both way will make it fire step by step. 4. Number of cues: What the time table shows is the sequential cue numbers during the sequential fire. Accessories & Parameters Channels: 20 Weight: 6KG Remote range: 150M Remote frequency: 315MHZ It is divided into A and B parts. Pls first press NO”11”button, then you can fire “A”part. If you press NO“12”button, you could control part“B”on the receiver. About shipping: We will send the goods to you by DHL/ UPS/EMS.They will send the goods to your door within 10 days. Pls check the tracking number from Aliexperssin 5 days after you do the payment. PS: All the firing systems will not contains batteries because of the air shipping. About shipping: We will send the goods to you by DHL/ UPS/EMS.They will send the goods to your door within 10 days. Pls check the tracking number from Aliexperssin 5 days after you do the payment.