Now with wireless technology you can transmit audio from anynbspaudio source so you can listen to music or even the TV in bed without disturbing those around younbsp The sound transmits through the pillow at comfortable listening levelnbspand works with any audio source that uses a 35mm audio cable How it works your iPod iPhone or sound source is plugged into the wireless unit which transmits the sound to the pillow Pillow requires 2 x AA batteries Features Range Approxnbsp 10m Weight of pillow 870g Material composition 100 Polyester -nbsp Cover 100 Cotton Frequency used for transmissionnbsp 1079 FMSizenbspof pillownbsp 74 x 48cm 19 x 29 Requires 2 x AA batteries