Product Description:Model: SR-629Audio: Analog Build-in Battery: Li-ion 3.7V 600mAhPower in: 5V (micro usb)Plug in: 3.5 x 17 mm 4 poleLED: 2 for A/B CHSize: 70x90x28 mmNet Weight: 68gBattery Life: 24-48 HoursThe SR-629 is a multi-function and cheaper device that connects any handheld or mobile radioBeside scan provide a the basic repeater function which has following the receiver transmitter, furthermore has the Simple connection provides the more ideal 2-way radio conversation region for you, causes you maintains the relation in the bigger operating regionWhen the radio units are connected, the received signal on a radio unit will be real time transmit on the other radio unit. e.g. VHF/VHF, UHF/UHF, VHF/UHF or UHF/VHF modesMode 1: When Radio A is RX, control to Radio B will TX. When Radio B is RX, control no FunctionMode 2 : When Radio A is RX, control to Radio B will TX. When Radio B is RX, control to Radio A will TXThe purpose can be done in two different places and using different frequency bands intercom, through our mutual communication relay stationThis is a radio cross band duplex repeater controller. It is an easy of operation and cost effective and highly flexible platform for setting up bi-direction cross band duplex repeater with mobile radio and handheld radioThe SR-629 has 2 audio ports input and out , they are used to connect with mobile and handheld radio. Multi-LED display 2 of radio status , and build-in battery LevelPackage:1 x SR-6291 x USB Cable1 x USB Power Supply1 x Instructions