VR100 shipborne active tracking 
        VR100 are "search type" receiver, you can see on the screen in real time data, if the whole match to the type and orientation of the type hydrophone use, you can immediately labeled a "continuous labeled" fish and eventually get roughly the GPS trajectory. 
Application Features 
 - with omni directional hydrophone and hydrophone 
 - followed by a fish can continuously track, get detailed behavioral information 
 - there are some limitations in terms of time and space 


VR2W passive tracking network 
        VR2W mark Vemco can receive various sizes, so from the river to the coast, we can use VR2W monitoring network to simultaneously monitor all kinds of aquatic animals. When an animal is marked into the VR2W listening range, VR2W can record data tag ID numbers and markings on the sensor. Scientists can cooperate with each other, sharing data and platform. Also achieve the effective use of the device between different items. 
Application Features 
 - are "sentry type" receiver, can monitor the fish "a" / "does not appear" Event 
 - For many long-term monitoring of fish a wide range of 
 - time scale, wide area surveillance, monitoring Species 
 - year-round, long-term duty 


VR4-UWM Coast tracking network 
        VR4-UWM with two hydrophones, you can receive all the 69kHz and 180kHz VEMCO coding markers, equipped with sound through the machine function, memory data can be transmitted via wireless acoustic communication technology to the deck, the system saves the cost of recovery and laying and time. Typically, VR4-UWM for offshore (500m water depth less) on a variety of aquatic animals to monitor a long time, very suitable habitat and migration studies. 
Application Features 
 - can store 800,000 times monitoring data 
 - 500m depth the scope of work, the battery life of up to 6 years 
 - password protection, data transfer rate of about 1100 baud 
 - can be integrated monitoring a variety of marine life 
VR4-G global tracking network 
         Marine animals VR4-G monitoring buoys for tracking away from the shore, the detection frequency 69kHz, commonly used in the monitoring of whales, sharks and other aquatic animals. Currently in Australia, California, in the Indian Ocean, Chesapeake Bay application. 
Application Features 
 - satellite communications, global coverage for remote monitoring points 
 - two-way communication, near real-time data acquisition 
VMT mobile receivers 
        VMT Set transmitter and receiver in one, that is, a 69kHz acoustic marker coding type, the receiver can be monitored VR2W-69kHz. Tag is also a 69kHz acoustic receiver can receive signals from other 69kHz, coded acoustic mark. Can be used to study the interaction between predators and prey. 
Technical Specifications 
 - receiver and transmitter combination of 
 - 8 to 10 months of battery life 
 - can be applied to the buoy, set fish, underwater glider above 
 - can be applied to large-scale aquatic above and integrates markers to improve the recovery rate. You can also integrate various types of sensors