CTX Virtual Technologies VK200 KEYFOB User Manual page 47

Electrical Characteristics
Item
External Power Supply
Battery & Capacity
Battery Operating
Time
Battery Charging Time
USB Interface
Bluetooth
Frequency Range
Channel
Modulation
Specification
USB Power / less than 5V 500mA
Lithium-ion Polymer Battery,
500mAh(MAX) @ 3.7V
Approx. 120min
Approx. 240min
USB 1.1 & 2.0, USB HID Ver 1.0
v2.1, HID Profile Ver 1.0
2402-2480MHz
79
GFSK
46