The Original Record A Call - Telephone Handset Recorder with Volume Control (White) With Additional 3 Micro Cassettes & Batteries One Touch, Crystal Clear Recording - Built In Condenser Mic for Sound Clarity - Pause Control Two Speed Recording Mode - Variable Speed Playback Plays Back While On or Off the Line - External Speaker Volume control for the hearing impaired - Compatible with all phones Durable & Lightweight - Includes 4 MC-60 MicroCassettes & 4 AA Batteries (2 required)