⭕ YSI 650MDS MULTI-PARAMETER DISPLAY WITH YSI 6600 SONDE , LONG CABLE and CASE. Unit tested, everything works as it should. Under 4 years old. The sonde come with these sensor YSI 6560 , YSI 6883 ,YSI 6562 , YSI 6884 , YSI 6565 , YSI 6156 and YSI 6025 Shipping or pick-up locally and comes with a 30 day right of return should it not perform to your expectations.