Established in 2007, Dongguan Bailing Electronic Co., Ltd. specializes in the production of roll ball sensor switches, tilt sensor switches, vibration sensor switches, vibration switches, optical roll ball switches, mercury switches, reed switches and metal parts that are mainly with the brand "Beelee". Our series of roll ball sensor switches provide accurate control for a wide variety of applications in security devices and alarms, toys and sports equipment, and automatic power-off ...