LTD is one of the sub-brands of ESP (other sub-brands of ESP, such as EDWARDS and Grassroots, are mainly sold in Japan and will not be discussed) to make up for the overseas market of ESP below RMB 10,000. The model of LTD, such as "M200", consists of English letters and numbers, the former indicating the piano type and the latter indicating the grade. LTD piano types, such as AX, V, EC, VIPER, F, PB, M, H, MH, MHNT, EX and FX, correspond to ESP standard piano types respectively; KH, GL, etc. Respectively corresponding to ESP customized signature piano models. The basic structure of each piano type and grade is the same. LTD grades are 1000 (also known as luxury series), 400, 200, 100, 50, 10, and some 500 and 300 (rare), and 300 has been discontinued; The signature amount is divided into 600 and 200. LTD's 300 and above are usually made in Korea; 200 and below are usually made in Indonesia/China.