Detailed Product Description Product Name:wireless doorbell1) Can be portable any place easily2) Not relation to other circumstance3) Be valid by 100m (maximum)4) Diverse 16 kinds of melodies5) Material: ABSFrequency: 315mHz, 320mHz, 335mHz, 350mHz and 433.92mHzInner packing: 1pc/blister cardOuter packing:36pcs/ctnCarton dimensions: 50 x 44.5 x 27.5cmN.W.: 3.6kgG.W.: 7.5kg