The WM5000V4s device is a continuation of the classic VM5000V5 model, but with the addition of a bright LED light to the design, which helps to make detours on unlit routes at night. The device is used to control bypasses by reading passive RFID tags with saving data in memory with subsequent transfer of data to the program using a magnetic USB cable or by connecting to a smartphone for data transfer via mobile Internet. The device is suitable for work in all weather conditions, is not afraid of falls, moisture and dust. The device comes with a case, cable, power supply and instructions. The device works with a free program under Windows and with a WEB cloud. The body of the device is made of aluminum alloy with a silicone shell and impact-resistant plastic, which guarantees increased wear resistance. On the front of the case there is a touch button to turn on the flashlight, and its parameters can be configured in the program. When the tag is read, the blue LED lights up on the indicator and vibration occurs, and when the battery is low, the device signals with a red indicator. RFID key fobs are used to identify employees who have made a round, which are read by the device before the employee changes. The tag can be read again after 60 seconds. The device's memory is non-volatile and can store up to 60,000 tag read records. For example, if you read 500 tags per day, then the memory will be filled after 4 months of daily work. The device's memory is rewritable, and the program's default settings include a parameter for clearing the memory after data is transferred to the program. The battery charge lasts for 60 days when reading tags 500 times a day. The main advantage over competitors is comparable to the WM5000V5 model, this is high performance and a bright LED flashlight, amazing reliability and a service life of 10 years, as well as a simple and well-thought-out program. Dimensions, mm 148 x 42 x 34 Memory 60,000 entries Battery 3.7V/1150mA, Water and dust protection IP 67 Application temperature -50℃~+85℃ Reading tags RFID tags 125KHz, reading distance 3-5 cm Communication with PC Speed data transfer via USB : 15000 records/minute Indication in the device Vibration with color LED notification (red, green, blue)