Product Size 129.7 x 76 x 35.1 mm Package Size 198 x 169 x 76 mm Features: ED400-1( with backlight screen, backlight buttons) ED400-2( just with backlight screen) ED400-3( just with backlight buttons) à Massage: improve physical comfort & well being à Tens: simple pain relief à Sports: tens+ ems co-functional à Ems: beauty/ shaping/ fitness/ muscle training/ regeneration Accessories: 1> Electrical stimulator device 1 pc 2> Electrodes Leads 2 pcs 3> 50( mm) â x 50( mm) â Adhesive Electrodes 4 pcs 4> 1.5V* 4( AAA) Ordinary Battery 4 pcs 5> Instruction Manual 1 pc 6> 1.2V AAA 800mAh Rechargeable Batteries( Optional Accessory) 4 pcs 7> Charger ( Input: AC 100~ 240V 50/ 60Hz Output: DC2.82V N 800Ma max Charging current 200~ 500Ma) ( Optional Accessory) 1 pc