Android Smartphones/Tablet don't need download app, but need OTG function (NOT compatible with iPhone or iPad with lightning connector). and other OTG enabled USB C phones/tablets. OTG USB C Smartphone/Tablet .
eBay
AK370 Bluetooth Amplifier Sound Amp HIFI 2.0 Channel Bass and Treble Adjustment for RCA SD USB Flash Drive USB Audio Input DC12V
Aliexpress UK
Supports MacBook Pro/Air (M1, M2), iPads, and major tablets. 1x USB-C SD Card Reader Adapter. Phones: iPhone 15, iPhone 16, Samsung Galaxy S/Note, Google Pixel. Compatible with SD, microSD, SDHC, SDXC, and MMC cards.
eBay
Live 11.25 Europe Map SD Carminal Integrato Navigation SD Card for Renault Fluence New Update Version Europe
Aliexpress UK
And with 2in1 USB-C/USB 3.0 design, BENFEI card reader could works with computer or laptop by USB 3.0/2.0 slot or the latest USB Type-C(Thunderbolt 3) slot. A universal card reader solution. Slot: 1 x SD,1 x Micro SD,1 x CF,1 x MS.
eBay
ZK-1001U 100W Bluetooth 5.3 Mono TPA3116D2 Amplifier Board Module Supports APP AUX USB Flash Drive USB Sound Card DC 9-24V
Aliexpress UK
Dual interface support: USB-A & Micro USB connectors. Connects via Micro USB to Android devices with OTG (On-The-Go) support. Plug and Play Convenience. Directly play photos, videos, and music from the card without using internal storage.
eBay
LEPY LP-269PRO 4.1 Channel Amplifier Bluetooth 5.0 Coaxial In USB SD FM Function Subwoofer Output Home Theater Amplificador
Aliexpress UK
UGREEN SD Card Reader, Aluminum USB C to Micro SD/SD Card Adapter, with 15CM Cable, Thunderbolt 3 for TF/UHS-I/SDXC/SDHC/MMC Card, Compatible with iPhone 15/Pro Max/Pro, iPad Pro, MacBook Pro/Air. ONLY supports FAT32/EXFAT cards on phones and tablets, NTFS is NOT supported.
eBay
Powerful Bluetooth Speaker Portable Sound box Large Subwoofer Wireless Stereo Music Karaoke Column Support FM SD USB with Mic
Aliexpress UK
New Premium USB C to SD card reader adapter Type-C Suitable for Apple iPad MacBook Pro Air 13 Samsung. USB C SD Card Reader, Micro SD to Type C OTG Adapter for SDHC SDXC TF. This converter adapter can be used to connect USB sticks, SD cards, and other data-related products to your phone, tablet, iPad, laptop, Mac Book, and other devices.
eBay
5V Mini PCM2704 USB DAC HIFI USB Sound Card USB Power DAC Decoder Board Module For Arduino Raspberry Pi 16 Bits
Aliexpress UK
ONLY supports FAT32/EXFAT cards on phones and tablets, NTFS is NOT supported. It also supports up to Thunderbolt 3 and Thunderbolt 4 speeds. Note: This SD card adapter supports UHS-II SD/TF cards, but the speed will be UHS-I.
eBay
Nobsound HiFi Bluetooth 5.0 Receiver DAC Stereo Audio Preamp USB Music Player FM Radio Headphone amp Supports U-Disk SD
Aliexpress UK
Supports bothMicro SD (TF) andStandard SD cards, allowing seamless file transfers between devices without the need for multiple readers. Supported Cards: Micro SD, TF, SD. No drivers required. SuperSpeed USB 3.0 Interface.
eBay
AK380 800W Bluetooth Amplifier HiFi Audio Karaoke 2 Channel Home Theater Amplifier Power Class D Amplifier USB SD AUX Input
Aliexpress UK