product information Model: Q1 Colour: Black Battery: Environmentally friendly polymer lithium battery Recording time: about 13 hours Playing time: about 8 hours Recording method: record when power on or save when power off Recording format: WAV Music format: MP3 or WMA or WAV 4GB can save 48 hours of recording 8GB| Can save 96 hours of recording Sampling rate: 48KHZ Product size: width 23mm x height 43mm x thickness 5mm Specifications: 1: OTG directly connected to the mobile phone to download, connect to the OTG adapter, you can play and manage the recording files on the mobile phone 2: Automatically save when power off. When the system detects that the power is insufficient, the recorder will automatically save the file in advance and then automatically shut down to ensure that the recorded data is not lost. 3: 18h uninterrupted recording, 30 days long standby, built-in high-energy polymer lithium battery and a new generation of power The intelligent energy-saving system is small in size, but can meet your recording needs 4: Large-capacity U-disk function, large-capacity U-disk storage function, built-in 8G or 16G or 32G large memory, no need to worry about recording storage space 5: Built-in time chip, intelligent time stamp, built-in time chip, with automatic time synchronization function, can be used as a time basis, convenient to browse and find files Package Included: Recording pen x 1[including data cable x 1, headset x 1. Manual x 1]