GCI Science & Technology Co. ,Ltd(GCIST) is a provider of electronic and information products and service. In the electro-acoustic transducers field, products range from piezo element, piezo buzzer, piezo transmitter/receiver and handheld microphone. More than 200 types have been developed. Now, miniature buzzers, piezo vibrators and piezo ultrasonic transducers are also offered. OEM and ODM products are welcome!