Is there a power supply for this? If not, how do I power it?

As the picture shows and the description states it comes with a USB power cable. The USB power cable cannot be used on a USB port from a computer as it needs more power than the computer will provide. It is best to purchase an adapter that plugs into an outlet and takes USB connection.

Does each "recording session" create a separate mp3 file added to the usb or sd card?

Yes it does. Each time you stop recording, the unit stores the mp3 file to the memory device.

Can you use a wireless microphone with transmitter and receiver to record audio onto this?

This was the reason for the purchase. I have not gotten the product to work with that set up. If it records anything at all, it just captures silence or static, and frequently stops recording (because it has not received a signal).

how is the recorded audio? is there any bass? i bought one like this and all high's and no low's in the recorded audio.

You set you own bass on your resiver

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Description

🎧 Capture nostalgia, share the vibe — digitize your soundscape effortlessly!

NO PC NEEDED - Record directly to USB or SD card—your music, your way, no computer required.
LEGACY MEETS MODERN - Transform your vintage cassettes, vinyl, and analog sources into digital gold.
HIGH QUALITY MP 3 OUTPUT - Standard 128Kbps 44.1KHz MP3 files for easy editing and sharing.
UNIVERSAL AUDIO CAPTURE - Plug into any device with 3.5mm or RCA output and digitize instantly.
REMOTE CONTROLLED CONVENIENCE - Start, stop, and navigate recordings from across the room with included remote.

The HopCentury Audio Capture Recorder converts analog audio from devices with 3.5mm or RCA outputs into high-quality MP3 files saved directly to USB flash drives or SD cards (up to 32GB). Featuring remote control operation, playback via earphones, and easy plug-and-play setup without a computer, it’s the perfect tool for preserving and sharing your classic audio collection in a modern digital format.

Specifications

Brand	HopCentury
Maximum Supply Voltage	5 Volts
Minimum Supply Voltage	5 Volts (DC)
Number of Pins	4
Interface Type	RCA
Number of Channels	2
Product Dimensions	6.2L x 6.6W Centimeters
Material	Plastic
Manufacturer	HopCentury Electronic Co.,Ltd
Country of Origin	USA
Model number	241B
Colour	silver
Special Feature	3.5mm audio input port, 3.5mm audio output port, RCA audio input port (red/white), press the record button to start and stop recording, support USB flash drive and SD card
Item Weight	49.9 g
Batteries	1 CR2 batteries required. (included)
Item model number	241B
Number of Ports/Connectors	5
Connectivity Technology	RCA, USB
Power Source	DC
Compatible Device	Cellphones
Are batteries included?	Yes
Lithium battery energy content	0.72 Watt Hours
Lithium Battery Packaging	Batteries contained in equipment
Lithium battery weight	0.07 Grams
Number of lithium ion cells	1
Hardware Interface Type	USB 2.0

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