World’s Tiniest fullyfunctional 2way Walkie Talkie radios Communicate by Morse code or Pushtotalk penetrates walls floors steel and concrete and works up to 100 feet apart. Flexible antennas for pocket portability. Each Unit Requires 1 x A23 battery (not included can be purchased separately) Size of product: Width: 1.75 Height: 2 Depth: 1.25 inchesAntenna size: 6.75 inches