Feature 1Power Source: 6V requires only 4 AA batteries per receiver. 2Range:150meters. Each receiver with the antenna. 3Fully programmable make any or all receivers to any button on any system remote. If you want to programmer the receiver, please put in a small stick on the hole which is on the receiver box. And then the light on the receiver box will be flashthen pre 4Expandable Add other receivers (available individually) to expand number of cues. 5Interchangeable & Economical: If one receiver has a little problem after used for a period, you could use others instead. Or you just need to buy the receiver, no need to buy the remote. Specification: Material: Plastic Weight: 265g/9.3oz Frequency: 433MHz Transmitter Power Source: 12v 23A battery (NOT included) Receiver Power Source: 4*AA batteries (NOT included) Channel Quantity: 8pcs Range:150m/5905.5inch Package List:: 1 *Remote Controller 2 *Receiver 1 Set *Connecting LineNote: 1. Handle your product with care avoid shaking and dropping it. 2. Keep the receiver as far away from your fireworks as possible to avoid damage. 3. Please remove batteries before storage, for prevent defile incept box. 4. Please do not place the product in the damp, sour, alkali and pollution environment. 5. All the systems are NOT including batteries.6.Please Note: that the new type and old type of this product will be sent randomly, and make sure you will not mind before ordering. Note: 1. Please allow 1-3 mm error due to manual measurement and 1-3g weight error make sure you don't mind before ordering. 2. Due to the lighting of the photos and the difference of monitors, the pictures may not reflect the actual color of the real item. Please make sure you don't mind before ordering, thank you! About Shipping: 1.please pay attention to your delivery address such as: name, street, house number, doorbell/email without name, etc. is correct, or the order will not be delivered correctly. 2.All items will be shipped within 3 business days after the payment is received. Most times you will receive them within 8-12 days then. The specific delivery time is depend on circumstances. 3.During the shopping process, if you have any questions, please feel free to consult us, we will reply you within 91 hours Hope you have a pleasant shopping experience!