Compatible with digital and analog: The DR-1801UV is compatible with digital and analog functions and you can switch to either at any time. It also supports dual band, dual standby, and dual display. FCC certification ID: 2AJGM-DM1801. Built-in multifunction: The DMR radio features channel scanning, manual programming, DTMF, VFO, SMS, emergency alarm, digital remote control function, CTCSS and DCS, and DMR encryption functions. There are 4 customizable keys for faster access to these functions. High durability and long standby: high performance and energy saving. The 2200mAh battery supports up to 17 hours of working time and 30 hours of standby time and can be fully charged in only 4 hours. DMO True 2 Time Slot: Direct communication with dual slots achieves two call groups on one frequency point simultaneously, so communication efficiency is doubled and frequency resources are saved. Maximum Power 4W Frequency Range: VHF 136-174 MHZ/UHF 400-480 MHZ (DUAL BAND) Channel Storage: 128 Groups Step Frequency: 2.5/5/6.25/10/12.5/20/25KHZ Operating Voltage: DC7.4V (Rechargeable Lithium Battery) Frequency Stability: ±1.5 PPM Antenna Impedance: 50 Ohm Battery Capacity: 2200MAH Dimensions: 110 x 28 x 32mm (without antenna)