Philips SpeechMike Premium Air Wireless Dictation Microphone (Push Button) + Philips AirBridge ACC4100 Wireless Adapter VPN integrated PoE (GRP2604P only) Devices:1 Device integrated PoE (GRP2604P only) 5–2 miles Power Settings Hi Lo eVOX Yes — 3 sensitivity levels NOAA Weather Yes — weather scan with severe weather alerts (10 channels) Call Alerts 5 Channel Scan Yes Monitor Mode Yes Silent Operation Yes — disables all tones Battery (included) NiMH rechargeable battery pack x 3 Battery (alternative) 3 x AAA alkaline batteries per radio (sold separately) Charger Desktop drop in charger with AC wall adapter (included) Display Backlit LCD Keypad Lock Yes Audio Jack Mic and headphone jacks Water Resistance Water resistant Colour Black Quantity 3 radios Warranty 3 year manufacturer warranty Sold by ITFactory The SpeechMike Premium has reached its highest stage of evolution You can easily move up to 5 meters or 16 feet away from your workstation and your recordings are safely transmitted to your computer in highest quality