feature: The sound quality is very good and you can quickly find open channels with automatic channel scanning. Monitoring methods for focus on children. Convenient buttons make operation easier and faster. No radiation, really close to the child's walkie-talkie. Good helper between children. Ergonomic design, multi-functional, convenient and flexible app makes your child happy and enhances family connection. specification: Category: Handheld Size: 15.5x5 for cm / 6.1x1.97 inches RF output power: 0.5 (for W) Theoretical communication distance: 1 (for km) Working voltage: 3.7 (V) Frequency stability: 2.5 (ppm) Color: orange, yellow This product is a button battery. walkie-talkie Requires 3 AAA batteries (please bring your own) Package Included: 1 pair x walkie talkie notes: Due to manual measurement, please allow 0-1 for cm error. Before you bid, make sure you do n'for t mind. Due to differences between monitors, the picture may not reflect the actual colors of the item. Thank you!