Wikipedia
E-Lybra
E-Lybra is an alternative medicine electrodermal testing biofeedback device manufactured by World Development Systems Ltd. Its manufacturers claim that the device can "analyze and restore energetic balance within the bio-field of humans and animals". The device is based on an alternative medicine system called "Energy medicine", whose practitioners believe that "energetic imbalances" can be detrimental to health.
A study done on a similar device found that the devices lack evidence for efficacy in diagnosing allergies. Quackwatch states that E-Lybra, along with other similar devices, transmit "false or misleading health information".