Simply connect easy-to-hold retro phone handset to your cell phone and enjoy clear conversation with volume control at your fingertips. When plugged into your mobile’s 3.5mm jack, you can answer, make calls or comfortably keep a chat going on this retro phone. Reduces concern of radiation, too. No batteries required. Specify color code. 8 1/2" L x 2 1/4" W x 2" H. Plastic.