RT-EVP Real Time Voice Recorder & Spirit BoxDISCONTINUED Compatible with Windows 2000, XP, Vista and Windows 7. Not compatible with Windows 10. Numerical 4-digit (0000) EVP Counter Interface Allows for more advanced question and response sessions. The Numerical Counter Interface with adjustable sensitivity, increments when a response is received, Tags, Dates Time Stamps the EVP Location on the recorded file, and can Separate a Class "A" EVP from other weaker responses. Auto ON / OFF Data Logging feature allows the RT-EVP's Counter Interface to be turned on/off to gather data automatically. This allows the user to place the RT-EVP anywhere and then retrieve it later. If any disturbances are detected during the recording time, they will logged and appear as tagged "counts" in the file. These Tags which identify the exact location of the disturbance, are provided to eliminate unnecessary file review time. Amplify Ambient Sounds up to 81.5dB with the Recorder ON or OFF to hear very low level voices and sounds. Operates in FM Frequency Sweep Mode with Multi Step Speed Adjustment from 50mS to 110mS