It is made of medical grade polycarbonate material.It is lightweight, hypoallergenic and durable. Color: Red&BlackCage size: length is about 80mm, diametere is about 33mmRing Size: One cage comes with only one ring.(40mm/45mm/50mm)One stainless steel tube , length is about 53mm ,diameter is about 6mm ;One piece aluminium electrode ;One piece cableNote: Include Power Box. Battery type: AAAX2 (1.5V) Do not include battery.Voltage: DC 3VPulse output power : MAX 100 V/20mAPulse frequency: 2-100Hz, Pulse Mode: 10 files strenth, 5 kinds of rhythmThe conductive circuit has been formed, no need of the additional electrodes.Cleaning: Use a mild soap and soft type brush (toothbrush) for cleaning.Do Not use household cleaning products.Attention :It is complex to assemble, you‘d better use it with your partner.