Technical data Kontel 300 Size: Diameter 240 mm, height 77 mm (9,44 in, height 3 in.) Weight: 1 kg. (2.2 lbm). Colour: Charcoal black. Display: Graphic LCD with backlight, 128x64 (5x2,5 in). Keypad: Alphanumerical 0–9, *, on/R, off, mute, hold, volumeup, volume down, 5 buttons for menu navigation, line selection mode, conference guide. Microphone: Omni-directional frequency range: 200–3300 Hz, analogue line 200–7000 Hz, USB 150–15000 Hz Playback. Reception area: Up to 30 m2 (320 sq ft) > 10 people. Speakers: Frequency range: 200-3300 Hz, analogue line 200–7000 Hz, USB 150–15000 Hz Playback. Volume: 90 db SPl 0.5 m three pitches: soft, neutral, sharp. Memory: Support for SD memory cards up to 2 GB. Anti-theft protection: Kensington security slot. Upgrades: The Konftel PC Suite upgrades Konftel 300 softwarevia the USB connection. CONNECTIONS Analogue phone connection Modular 6/6 modular (RJ11) to a public analogue telecommunication network or an analogue PBX. PC connection: USB 2.0. Mini B. GSM/DECT connection: 6/6 DEC. Power supply: Transformer 100–240 V AC/14 V DC. Expansion microphones: modular 4/4. Auxiliary: 4/4 modular for wireless headset. ENVIRONMENT Temperature: 5° – 40°C (41–104 F). Relative humidity: 20–80% condensation free. Recommended acoustics: Reverberation time: 0.5 S Rt 60.Background noise: 45 dbA. APPROVALS Telecommunication: TBR21, 47 CFR PART 68/TIA, IC CS-03 Issue 1 Jan. 1999. EMC: EN301 489-1,3. EN 300 220-1,2, FCC subpart B and C. Electrical safety: UL 60950-1, EN 60950-1:2001.