Features 1),6-8 seconds voice recording. 2),Powered by 2 x AA excluded 3),against a flat,clean surface such as you bedroom's door to make it stick or hang the doorbell use a hanging hole on the back of the doorbell as another option. 4),can use the recorder to leave the message to you family and friends Place of Origin: china Payment Terms : T/T D/D PayPal Quantity: 200,000pcs/month Minimum Order : 1000PC Delivery Lead Time : 30 days