The JST 11HR-4K is an 11-position IDC receptacle from the HR series, terminated to discrete 24 AWG wire via insulation displacement — no crimp tool needed, just a press. The black housing and Tin-Lead contact finish are standard for this series; the Tin-Lead plating means this part is not RoHS-compliant, which matters for any build shipping into EU or similar restricted-material jurisdictions.
It's sized for 24 AWG discrete wire. No stripping or crimping; the termination tool seats all 11 wires in one stroke. The free-hanging (in-line) mount means the receptacle floats in the harness, not fixed to a panel or board. The closed-end feature blocks wire push-through past the contacts.
The 11HR-4K mates with the corresponding JST HR series pin header (same 2.50mm pitch, 11 positions, single row). The detent lock on the receptacle side engages a ramp on the header shroud — you'll feel it click home. No secondary lock or TPA on this housing; the detent is the only retention. For a harness that sees constant flex or high vibration, consider adding a wire-to-board latch or a cable tie to the wire bundle for strain relief.