Features as below: With superbig adhesive pad More power Butterfly shape gives a sense of beauty Massager effects: promotes blood circulation and releases muscle pain Can turn off automatically after 10 minutes Specifications: Voltage: alkaline 3.0V (two pieces 7# batteries) Frequency: 1 to 100Hz Maximum output: 5.5mA Dimensions of main machine: 60 x 78 x 15mm Size of adhesive pad: 194 x 96mm Weight: 118g Accessories as below: One piece main machine One piece adhesive pad Two pieces number 7 batteries One piece instruction manual