Feature: 1. Application: Radio duplex repeater controller that can connect to any handheld or mobile radio. With LEDs to display radio status, battery level, etc. Adopts new generation of trunking boards and other equipment with finer internal structural design. 2. Radio Range Extender: Provides a basic repeater function with follow on receiver and transmitter with simple connections, providing a more desirable two way radio talk area, allowing you to stay connected over a larger operating area. 3. Multifunction: This repeater controller has 2 sound port inputs and outputs for connecting mobile and handheld Radios. Provides password protected DTMF remote control. The repeater can be turned on or off remotely via DTMF. 4. Safe And Practical: Cross band duplex repeater controller, a simple to operate and flexible platform for two way band setup. Allows users to change the DTMF remote control password via radio, with password protection. 5. Long Battery Life: Radio repeater controller built in 900mAh Li ion battery, long life, can run for 72 hours, support external DC +5V‑24V power supply, professional manufacturer low power consumption. Specification: Item Type: Repeater Controller Material: ABS Product Size: Approx. 110 x 80 x 25mm / 4.3 x 3.1 x 1in Battery: 900mAh Lithium Battery (Included) Charging and External Power Supply: DC +5V-24V DTMF Remote Control Protection: User Defined 4 Digit Password Protection Standby Time: 180 Hours Indicators: Status LED and External Power Input LED. Package List: 1 x Repeater Controller2 x 46 K Plug Cable1 x Charging Cable 1 x Instruction Manual Note: Manual measurement, please allow some errors.