South Central Railway

South Central Railway has published Supply Of portable pa neck band system- specifications: power output- 12w max., speaker impedance-4ω, input channel- mic-1: 1.0mv, line-250mv, mp3 playback: usb & tf card (16 gb pendrive), frequency response: 80-12,000hz, ac adapter: ac: 100-240v, 50/60hz; dc: 5v, 750ma, built-in rechargeable lithium-ion battery: 3.7v, 200mah, headband microphone element: condenser, cardioid, dimensions: w-86 x h-98 x d44 mm, weight (with built-in rechargeable battery): 0.34 kg approx. , accessories: headband microphone, ac power adapter (for recharging lithium-ion battery), neck strap, charging indicator led: yes or more. (ahuja or similar). Last date of submission for this tender is 2026-07-31. This is a Speaker tender in Vijayawada, Andhra Pradesh