Nintendo N64 Jumper Pak Terminator
The Nintendo 64 requires a Jumper Pak for any game to play, otherwise you'll just get a black screen when you turn it on.
If you don't have a Jumper Pak, you can use this product to terminate the connection, which completes the circuit and allows the system to turn on & play games.
Simply plug it into the jumper pak port and get back to gaming.
Note: This is not a memory pak. It only allows the N64 console to power on without a memory pak installed.