Topcom Butler 3501 Twin/Triple/Quattro
9. TECHNICAL CHARACTERISTICS
•  | Standard:  | DECT (Digital Enhanced Cordless Telecommunications)  | 
  | 
  | GAP (Generic Access Profile)  | 
•  | Frequency range:  | 1880 MHZ to 1900 MHz  | 
•  | Number of channels:  | 120 duplex channels  | 
•  | Modulation:  | GFSK | 
•  | Speech coding:  | 32 kbit/s  | 
•  | Emission power:  | 10 mW (average power per channel)  | 
•  | Range:  | max 300 m in open   | 
•  | Base power supply:  | 230 V / 50 Hz for the base  | 
•  | Handset Batteries:  | 2 rechargeable batteries AAA, NiMh 550mAh  | 
•  | Handset autonomy:  | 200 hours in standby  | 
•  | Talk time:  | 10 hours  | 
•  | Charging time:  | 
•Normal conditions of use: +5 °C to +45 °C
•  | Dialling mode:  | Pulse / Tone  | 
•  | Flash time  | 100 or 250 ms  | 
26  | Topcom Butler 3501 Twin/Triple/Quattro  |