Binoculars

Binoculars — Team Rocket's gadgets.

The Beginning
In S1E8, The Path to the Pokémon League, Jessie, James and Meowth watched Ash battling AJ with their binoculars and talking about his Sandshrew.

In S1E9, The School of Hard Knocks, they watched Ash and friends near PokéTech with less high tech binoculars, talking about this institute with Jessie and James remembering how they both were flunked out of there and Meowth trying to cheer them up.

In S1E10, Bulbasaur and the Hidden Village, they were seen watching the Hidden Village with high tech ones and preparing to attack it.