Motorola L501BT User Manual page 14

Technical Specifications
RF frequency band 1921.536 MHz – 1928.448 MHz
Channels 5
Operating temperature 5°C to 45°C
Telephone base voltage
96 – 130 Vms
(AC voltage, 60Hz)
Telephone base voltage
6V DC, 400mA
(Adapter output)
2.4V 550mAh Ni-MH battery pack
Handset voltage
Charger voltage
6VAC, 300mA
(Adapter output)