The single RMM2050 On-Site 2-Way Radio from Motorola operates on five MURS FCC license-free frequencies, and is designed to provide secure workplace communications in environments up to 13 floors or 220,000 ft . Its built-in 1500MW speaker is designed to provide enough output for use in noisy conditions, such as construction sites. FCCID: AZ489FT3831 The RMM2050 includes a rechargeable lithium-ion battery, as well as a drop-in tray charger. A holster and power supply are also included.Manufacturer Included Items:Motorola RMM2050 On-Site 2-Way Radio (Single)HolsterLithium-Ion BatteryPower SupplyDrop-In Tray ChargerBundle Items Include:4 x Motorola RMM2050 On-Site 2-Way Radio4 x Motorola HKLN4606 Remote Speaker Microphone