... key,volume contro Why choose Mobile Phone Transceiver?Hands Free, Retro style, radiation1) Talkback systems .There is a loud speaker and ... batteries)Cord Length: Compressed 50cm (about time),Plug: 3.5mmFeatures:1: Style and convenience: Use this awesome transceiver as a speaker ... function, Microphone functionPower by two AAA batteries(not included)Package: 1 x InterphoneDimension: 7.87 x 66.5 x 2.05cm ...