Smallest size without LCD display One button to control power on(recording) and power off (save recording) Small clip on the back side Connect earto listen and adjust volume Material: Aluminum metal Record distance: up to 40m Support record while recharging Memory life(8GB) for recording: 68hours(8GB) Aluminum alloy Rechargeable 90mah Lithium battery Recording duration after full recharge:9h-HP Memory inside up to 16GB Weight:10.6 g