This is an old legacy wireless mouse from Logitech. This uses a ball rather than optical technology. Bottom of the mouse, showing the battery cover & the mouse ball. Top removed from the mouse, showing the PCB inside. The smaller PCB on the left supports the microswitches for the buttons
Here is an old Belkin Wireless G network card. This is a PCMCIA version. Here is the bottom of the device, with all the details. Plastic antenna cover removed, showing the pair of 2.4GHz etched antennae. There is a pair of LEDs on the upper left of the PCB showing
This is an old cordless landline phone, with dead handset batteries. Here’s the handset with the back removed. Shown is the radio TX/RX board, underneath is the keyboard PCB with the speaker & mic. All the FM radio tuning coils are visible & a LT450GW electromechanical filter. Radio PCB removed