Part number 946-05121A. Alternative: 946-05121, 746-05121A, 746-05121 Applicable models: M320, TB390ES, TB380ES, TB370, TB360, SP21S-H, SP21SE, SP21S, SP21HW-H, SP105, M310, SC500Z, SC500EZ, SC500E+, SC500 hardware, SC500 EZ+, SC500EQ Please refer to the original user manual for full compatibility