Characteristics of 3 * 8 and 2 * 6 crystal resonators: wide frequency range, high shock resistance, small volume and reliable frequency stability. Small size and small tolerance crystal is used as microprocessor system crystal, consumer electronics crystal, instrument crystal, automobile electronics crystal, small household appliances crystal, charger crystal, card reader crystal, U disk crystal, LCD crystal oscillator, digital photo frame crystal oscillator, electronic guitar crystal oscillator, electronic audio crystal oscillator, audio power amplifier crystal oscillator, electronic game machine crystal oscillator and mobile storage crystal oscillator.