Bluetooth is commonly used to transfer sound data with telephones (i.e., with a Bluetooth headset) or byte data with hand-held computers (transferring files). Bluetooth protocols simplify the discovery and setup of services between devices. Bluetooth devices can advertise all of the services they provide. Features: With jog mode and self-lock switch, timing mode. A mobile device that sets the relay and stops time (maximum open 100 hours, of 100 hours), up to 999 cycles can be set; The time parameter can save ten groups on the end of the mobile phone, and the next time the application starts, only one main operation is needed to avoid the boring and repetitive setting. The working status of the relay can be inquired in real-time. Each mobile phone operation, terminal alarm unit prompt feedback. Specifications: Item Type: Time-Controlled Switch Model: DZL-30A Material : Plastic Uses: Household, factory use Power Supply Voltage : 220VAC Load Current: 30A Product Size: Approx. 43mm / 1.7in33mm / 1.3in 27mm / 1.1in 66mm / 2.6in Package Includes: 1 x Mobile phone APP Bluetooth Time Control Switch Timer