'k Weet niet of deze een ingebouwde batterij heeft want de specs zijn niet altijd gedetailleerd...
Butt Set
Recognized as the new industry standard, the butt set provides superior quality at an affordable price. With its high impedance monitor for data safe operation, technicians can clip onto a line in Monitor mode without disrupting existing traffic. Prokit's unsurpassed protection standards and durability assure the butt set will keep working even in the toughest environments. New weatherproofing provides enhanced resistance to severe weather conditions.
Electrical
Loop limit
2 KΩ maximum at 48 VDC (nominal 20 mA minimum loop current)
DC resistance (Talk Mode)
300Ω typical
Monitor impedance
39kΩ nominal at 1 KHz
Rotary dial output
Pulsing rate 10pps+0.8pps
Percent break
61%¡Ó2%
Interdigit interval
1000 ms typical
Leakage during Break
>50 KΩ
DTMF output
Tone frequency error
¡Ó1.2% maximum
Tone level
-8¡Ó2dBm combined (typical)
High versus low tone Difference
4 dB maximum
Memory dialing
Memory capacity
12 memories plus last number redialing
Digit capacity
16 digits per memory
PBX pause
4 seconds
Monitor amplifier
9V transistor; provides 25 hours continuous
Power source
use, typical
Speaker levels
Low, medium, high
Automatic power shut off
After 5 min. of no audio signal
Speaker phone levels
Low, medium, high
Power source
Shared line and battery power
Physical
Length
10-1/4 inches(26.0 cm)
Width
2-3/4 inches(7.0 cm)
Height
3-1/2 inches(8.90 cm)
Weight
560 g typical
Environmental
Temperature Operating:0 to 50¢ / XC Storage:-40 to 66¢XC
Altitude relative humidity To 10,000 feet 5 To 95%