Feature: 1. EASY TO USE: Mini Voice Recorder can record when it is on, record when there is sound, stop when there is no sound, save in segments, save memory. 2. NOISE REDUCTION: Keychain voice recorder is equipped with an octa core DSP acoustic processor, which helps filter background noise and record more clearly. 3. ENCRYPTION TECHNOLOGY: Voice activated recorder is equipped with an encryption technology program to effectively protect files and record your own diary files. 4. ZINC ALLOY: Digital mini voice recorder is forged with a one piece all zinc alloy, which is impact resistant and wear resistant. 5. WITH EARPHONE: Keychain digital voice recorder with headphones, immerse yourself in the world of music, and support in line operation. Specification: Item Type: Keychain Voice Recorder Material: Zinc Alloy Recording Mode: Power On Recording, Power Off Saving Recording Format: WAV Playback Format: MP3 WMA WAV Built In Polymer Lithium Battery: 120mAh. Package List: 1 x Keychain Voice Recorder1 x Charging Cable1 x Earphone1 x Instruction Manual