Keyboard extension for PC can extend 100m without weakening the signal Keyboard extension for PC can extend100m without weakening the signalShanghai Jingling Enterprise Co., LTDAdd: 411# Jiuxin Road, D-of Songjiang, Shanghai, 201615, PR. ChinaTel: (8621)37693956 Fax: (8621)57639806 Keyboard Extension Line for PC