Feature:1. Phone Recorder: Applicable to all analogue phone lines, this recorder enables high impedance recording for good sounds quality.2. Loop Recording: First in first out mode, when the memory is full, the loop recording will overwrite the oldest recording file.3. RJ11 Interface: Connecting the phone through RJ11 interface, and the recorder will automatically recognize the input and output.4. Smart Charging: USB interface makes the charging very easy, just plug and play, and the ASIC will be powered by telephone system.5. Simple Storage: Can also work with a memory card to safe the WAV audio file, which can be directly read through U disk function.Specification:Item Type: Phone Call RecorderItem Model: TELREC01Product Colour: WhiteMemory: Maximum support 32GB memory card, delivery without memory card. Telephone Interface: RJ11Charging Interface: Micro USB InterfaceLoop Recording: Support loop recording. Data Reading: The recording file can be directly read through the U disk function. Supported Phone Types: All analog phones are supported. Audio Format: WAVWorking Temperature: 0 - 40Battery Type: Built in single 3.7V 750mah lithium ion battery, shipped with built in battery. Battery Model: 14500Battery Capacity: 750mAh.Package List:1 x Phone Call Recorder1 x Cover1 x Data Cable1 x Telephone Wire1 x User ManualNote:Charging is required for the first use, and may require weekly charging with a USB charger when the phone line is connected. If the phone is busy, you may need to take it out to charge on a USB charger on a weekly and monthly basis for normal use.