1) push button swithc 2) 2pcs AG 10 batteries 3) customized music or ... sound postcard sound chip 60s pre-recorded sound push button sound chip for postcard : Message: voice, music, sound are availableFunction: message pre ... pre-recorded duration: 3 to 270s for recording functionComponent: PCB, voice chip, a speaker, mic, LED indicator and batteriesBattery: 2 x AG10OEM and ...