The Kastar BT-905 BP905 Battery is a white NiMH battery designed for use with Again & Again cordless phones, specifically models STB-114, STB-505, and STB-961. This bundle includes one 600mAh battery with a voltage of 3.6V, providing long-lasting power for your home telephone. The product is designed in the USA and assembled in China, ensuring quality and compatibility with your telephone. Additionally, it carries a California Prop 65 Warning due to the presence of chemicals known to cause cancer and birth defects.