1.Suitable mo mea faʻapipiʻi.Otometi atoatoa e le'i vaaia.
2. Tu'u atu mea e mautu, malosi ma tutusa e ala i le vibration ma le taamilosaga.Leai se mea fa'ailo (filifiliga).
3. Amplitude fetuutuunai e pulea le tafe.
4. Electromagnet type faʻatasi ai ma le faʻaogaina o le vibration faʻainisinia, fausaga faigofie, faʻapipiʻi faigofie ma faigofie ma le tausiga.
5.Simple structureeasy e faʻapipiʻi ma tausia, maualalo tau tausiga, ola umi.