Dual Mode: Bluetooth 5.0 + 2.4 G wireless（Dual Mode）. Bluetooth Mouse Feature 1 x Bluetooth Keyboard. Keyboard Features 1 x Bluetooth Mouse. 1 x USB Charging Cable for Keyboard. Mouse connection modes.
eBay
8BitDo Retro Mechanical Keyboard C64 Edition Bluetooth/2.4G/USB-C Hot Swappable Gaming Keyboard with 87 Keys for Windows Android
Aliexpress UK
Wide Compatibility: Compatible with iPad,Android tablet/Windows tablet. (Note: The keyboard may not be possible to connect to the device via the Bluetooth adapter.). The keyboard connected with bluetooth(your device should support bluetooth function).
eBay
Bluetooth Wireless Keyboard Mini Keyboard For MacBook iPad 2.4G Rechargeable Gaming Receiver For Android iOS Windows
Aliexpress UK
Support IOS, Android and Windows system, this viable wireless keyboard for most tablets and smart phones like paraIPhone, paraIPad 2018 2017, paraIPad Pro, paraIPad 2/3/4, paraIPad Ar 2 1, ParaSamsung Galaxy Tab, for GALAXY Note, for Nexus 10, for LG, for Nexus, for Huawei, for ZTE etc.
eBay
8BitDo Retro 87 Mechanical Keyboard with RGB Backlight, Bluetooth/2.4G/USB-C Hot Swappable Gaming Keyboard for Windows Android
Aliexpress UK
【Bluetooth Foldable Keyboard with Stand】This ultra-thin, portable, foldable keyboard weighs only 191 grams. After folding, it has a slim shape (195 85 15 mm). The product does not include charging cable and charging head.
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Mini Wireless Keyboard A8 Backlit 2.4G Bluetooth Mini Keyboard Flying Mouse Air Mouse Remote Control Touchpad for Android TV Box
Aliexpress UK
Built-in Touchpad - The touchpad on the left side of the keyboard allows you to move the cursor freely as the mouse. Integrated slot for tablet/cellphone provides you with a comfortable viewing angle.
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Slim French AZERTY Layout Bluetooth Keyboard Small Size Wireless Keyboard clavier for iPad iOS Android Windows Smart TV
Aliexpress UK
Wide Compatibility: Keyboard compatible with all iOS, iPadOS, Android, Windows devices compatible with Bluetooth. Such as iPad, iPhone, Android tablet (Samsung tablet, Xiaomi, Huawei, Lenovo) and other Android and Windows devices.
eBay
2.4Ghz Wireless Keyboard BT5.0 BT3.0 Dual Bluetooth Numeric Keypad 35 Keys Digital Keyboard Rechargeable Numpad for IOS Android
Aliexpress UK
Compatible devicesTablet, Smartphone Connectivity technologyBluetooth Keyboard descriptionWireless ColourBlack StyleModern Excellent Compatibility: Bluetooth keyboard compatible with iOS, Android and Windows system,Easy switch with shortcut keys (FN+Q/W/E). It is perfect for Apple iPhone, iPad, iPad Mini, iPad Pro, iPad Air, Android Samsung LG Windows tablet smartphone. Long-term use: Built-in rechargeable lithium battery, after fully charged, it can be used for more than 20 days (When used continuously for 2 hours a day). If you don't use it for more than 10 minutes, the keyboard will automatically enter the sleep state to save power. If you want to continue to use it, just click any key to wake up the keyboard.
eBay
8BitDo Retro 87 Mechanical Keyboard - MechaBREAK，Bluetooth/2.4G/Wired，Hot Swappable Gaming Keyboard For PC Windows 10 ,Android
Aliexpress UK
Widely Compatibility: Compatible with most Bluetooth enabled devices. Note: Doesn't support Win 8 system. For iOS devices, select British. For Android devices, select English (UK). 7-Color Backlight Wireless Keyboard:The wireless Bluetooth keyboard has 7-color LED backlight with breathing lights and constant light modes.
eBay
Russian Bluetooth Wireless Keyboard and Mouse Combo Split Ergonomic Keyboard for Windows Mac Android Rechargeable Mice
Aliexpress UK