Features: Built-in 32GB flash memory, can save 9000 minutes of loop recording Support loop recording, All analog phones are supported, 't worry about insufficient storage space. Recording files can be read directly through the U disk function. The system can automatically check and recover, and the records are reliable and stable Low Noise Digital Telephone Recording Box for Device Parameters: Memory: 32GB -SD card Recording Formats: WAV Date and Time Stamp: Yes Recording Bitrate: 192Kbps USB Port: USB 2.0 Frequency Response: 20Hz -20KHz Power Adapter: 5V 1A Working Temperature: 0 - 40 Weight: 50g warn: Application: Please strictly abide by relevant regulations and laws. This product should not be used for any illegal . Working temperature: 0 - 40C. Operating Humidity: This product is not waterproof, so do not wet or use it in a humid environment. Other matters: Do not use this product in a strong magnetic field or strong electric power environment. Notice: After installation, please check whether the power connection is correct. If the U disk cannot be opened, please format the U disk If the LED flashes quickly, the SD card is installed incorrectly, please open the cover and reinstall the memory card. Plug Type: EU Plug, it applies to Indonesia, Germany, France, , Italy and so on voltage: AC100-240V size: 55 x 35 x 25mm Material: Metal colour: black Package Contents: 1 x Telephone Recorder 1 x USB Cable 1 adapter Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.