Transmission range: 100m (in open area) Power source of button: 1×23A 12V battery (included) Music: A）Double clink & Alice & Westminster B） Customize different types of music Transmitting frequency: 433MHz/315MHz/418MHz CartonSize：55.5×46.5×26.5(mm) Power source of receiver: 2 × AA battery/AC230V/AC110V Approval：CE,R&TTE，RoHS