Features: The tr1 two way radio circuit board is expertly crafted for seamlessly communication, offering a robusts two way radio transmission that ensures your messages are constantly clear and concises. Featuring a compacts designs with customizable setting, this circuit board is perfect for two way radio manufacturing or diy modifications, providing reliable performances in any setting. For electronics enthusiasts, technical engineers, and diy hobbyists look for component to enhances their communication devices. This circuit board is excellent choice for on site construction team, event coordinators at mall and exhibition, as well as internal communication within hotel, schools, and logistics operations. Upgrades your communication tool with the tr1 two way radio circuit board, a must having for any professional seek efficient, short ranges voice connectivitys in demanding environment. Specifications: Component:PCB Size:Approx.55x36.5mm/2.17x1.44inch Circuit Parameters: Communication distance: 300meters (open spaces) Working voltages: DC3.3-6V Transmit current: 25mA Receive current: 25mA (0 gear) 150mA (8 step) Channel: CH1 CH2 CH3 CH4 CH5 CH6 CH7 Operating Frequency MHz: 467.6625 462.6625 446.05625 409.8000 168.2625 40.650 27.125 Package Includes: 1pcs PCB Circuit Board note: 1.Please allow 1-2cm errors due to manual measurement, make sure that you donot mind befores you order. 2.Due to the differences between different monitors, the picture may not reflect the actual coloring of the item. Thanks for your understandings.