Review on Streamline Your Accounting with SANWA Rechargeable Bluetooth Numeric Keypad - Compatible with MacBook, Windows, Android, iOS, Black by Ishon Prz

This works very well for me. I particularly like that it is very thin and light, consumes no power and does not require a USB port. It sleeps after not being used for a while, but a button press wakes it up and instantly reconnects, so that wasn't an issue. I'm not sure what time it is before bed, but since I didn't notice, that's a good sign that he's keeping a low profile. If the reliability is good, I'm very satisfied.