I hate these tanks that plug into the office or home computer via the USB link and have some water flow, making the buyer think it is quite a good home but also doubles up as a fancy desk tidy at the expense of the fish.
my local pet store actually sells these and they have betta's in them displaying them as suitable for betta's.
This is the actual write up for it that is on ebay.
Mini Aquarium Fish Tank With USB LCD Desktop Lamp Light LED Clock
The USB LCD Desktop Lamp Light Fish Tank Aquarium is great for small fish. It is featured with LED light, decorative gravels, an artificial plant and a LCD for displaying clock, calendar, time, date, and temperature.
Creative design, multi-functions, and reliable quality.
Mini fish tank with running water (recirculation).
The water stored in the fish tank can be running circularly that fresh air can be provided for the fishes living in the fish tank.
Hold about 1.5L of water.
Come with decorative pebbles, an artificial plant, and a USB connector.
Adjustable overhead LED light and multicolor LED interior lights under water.
2 switches are used for turning on/off the LED light and switching the water pump on/off.
6 modes of tranquil nature sounds, like sounds of frogs, sounds of bird, sunds of water, etc.
Backlighting LCD display is featured with alarm clock, calendar, time, date, temperature, and snooze.
Dual compartment desk organizer or pen holder for setting pens, rulers, etc.
A great unique and unusual gift for your friends.
Note: the moving water is powered by USB power. It will be running after you connecting the USB cable to PC.
Color: Black, White. Please let us know the colour when you purchase.
Material: Plastic(main) and Metal
Batteries: 3 * AA batteries (not included) for LCD
USB Power: DC 5V for the Fish tank's pump and lighting
LED light: 6 white LEDs and 2 colour-changing LEDs
LCD display: Clock, Calendar, Alarm, Temperature
Sounds: sounds of frogs, sounds of bird, sunds of water, etc
Item size: 24 * 20 * 9.7cm
Item wight: 705g
Package size: 27.5 * 21 * 13.5cm
Package wight: 1000g
1 * USB Desktop Aquarium Fish Tank
1 * USB Cable
1 * Pack of Pebbles
1 * User Manual