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This is a large wired/wireless mouse, that can connect via USB, Bluetooth, or an RF Dongle. It can be used with all sorts of devices that support mice, although the supplier is promoting it as a wireless Gaming Mouse.GAMING MOUSE?If you're playing fast combat games online or offline, you want a mouse that reacts fast too, apparently. I've never found mouse speed an issue, more of an excuse; network speed and latency have until recently always been a much bigger problem. Anyway, this is sold as a Gaming Mouse, emphasizing:* High speed data (1000Hz polling) so reacts fast to your movements* Switchable resolution (up to 2200 DPI) making it very sensitive to even small movements* Three different connection options, supported by Windows PCs, X-Box, PlayStation and Macs* Light weight (you can move it fast, with litle effort)* Big and comfortable for long play sessions* Extra buttons for direct access to useful functionsIn truth I'm not playing many games on my PCs at the moment (six months ago I did little else!), so most of this review will be about using the mouse on a Windows PC in a home office role.IN THE BOXIn a tidy retail box, I got:* A large white mouse* A USB-A to USB-C cable (for charging and connecting)* An RF dongle (behind a hatch on the mouse)* A large multi-lingual Instruction Sheet folded many timesThe Instruction Sheet has four little (A7 ?) pages in each language. It's quite good, hurrah!SETTING UPNot much to do:1: Remove the blue plastic film from the skids2: Plug it into a USB socket to charge itUSING ITI've mostly use the Attack Shark mouse with my Windows 10 "office" PC, with side-by-side 1920 x 1080 monitors.USING USB (Windows PC)I started off by plugging the USB lead into the front of the mouse and a USB hub on my PC. After a few seconds, it sprang into light and worked just fine. Initial impressions were that it's big and comfortable, the USB cable is very flexible, and the default settings are fine.Mouse Button 1 (MB1) and Mouse Button 2 (MB2) are large plastic "flaps", very comfortable. Mouse Button 3 (the mouse wheel, MB3) looks and feels a bit more awkward, but works OK. Mouse buttons 4 and 5 are on the left-hand side and a bit harder to find, but that's OK - intrigued to see what they can do for me.USING RF (Windows PC)I removed the USB lead after a few minutes, removed the RF Dongle from its home underneath the mouse, and plugged that in. Then I changed the POWER switch from OFF to the RF DONGLE image. Windows took around 30 seconds to set this up, then the mouse was back - and working just the same. I carried on using the mouse via RF and all seems well and then tried Bluetooth.USING BLUETOOTH (Android Phone)Not at all sure what I'd get, I enabled Bluetooth on my phone and switched the POWER switch to BT. My phone listed X11SEmouse1 as a new device, so I paired with it and now I have a mouse pointer on my phone! I shouldn't be surprised, but I am.I played around for a bit and everything worked as expected; the pointer moves, MB1 launches apps and clicks other buttons such as HOME and BACK.I turned off BT on my phone, held down the MODE button to enter pairing mode for the second BT channel. Turned BT on again on my phone and successfully paired with X11SEmouse2.Having two BT channels is a minor convenience feature. If you need to switch back and forth between your PC and your phone (say), you can pair a different channel with each. I don't think there's any reason to send the same mouse data to two different devices at the same time - unlike (say) streaming audio data to two different smart speakers.BUGSI noticed an odd limitation using Windows. I have a dual screen setup (two 1920 x 1080 pixel LCDs) to give me a 3840 x 1080 virtual desktop. With my usual mice (various brands) this works seamlessly. With the Attack Shark mouse, if I drag a window from the left-hand screen to the righthand screen, as soon as the mouse pointer enters the righthand screen, it stops moving; the window is stuck (and tries to maximise). This is a major annoyance for me, I move windows around a lot!I can move the mouse pointer into the right-hand screen if I'm not dragging a window and it works normally - until I try to drag a window into the left-hand screen, when it gets stuck in the same way.Darn.MOUSE BUTTON 4 & 5By default, these perform a "go forward/go backward" function which depends on the application you're using. For example:* In Windows File Explorer, they move to the previous/next folder if you've been moving around* In Google Chrome they move to the previous/next window on that tab if you've been moving aroundHandy.OTHER BUTTONSThe POWER button is a slide switch with three positions:* OFF means it's turned off UNLESS it's connected to your computer via USB, when it's in USB mode and powered by your USB socket (and charging)* The DONGLE ICON means it...