Simple and Convenient Wireless Design Sensor + Speaker in one Built in – Loudspeaker Greetings : 38 songs Low energy usage Volume : Low Mid High Alarm Mode Available Optional Micro USB Power Signal between 2-8 meters Battery : AA x 3 (not included) or USB (not included) Pcs per Carton : Pcs Barcode No : Outer Carton Dimension : Cm Gift Box Dimension : Cm Kg per Carton :Kg Gram per Pcs :