MÔ TẢ CHUNG M35/M35F is the world's quad-band GSM / GPRS module, the size is only 19.9 x 23.6 x 2.65mm. With ultra-small size, ultra-low power and wide operating temperature range, the M35 is ideal for M2M applications for automotive, industrial and PDA, personal tracking, wireless POS, smart metering and other M2M applications Perfect GSM / GPRS SMS, data transmission and voice servi..