tender for procuring wirelss walkie talkie for the use of mavady, kottamala, thamara, periyar, sundaramala, ummikkuppan sections and kumarikulam wireless station and thannikudy machan apc under periyar range during the year 2025-26 , cost of procuring vhf handset radios, 5w power, li-ion battery, single unit rapid charger, standard vhf antenna, belt clip, etc. including gst. specifications general frequency coverage: [tx/rx] 136.000-174.000mhz mode: f3e (16k0f3e (wide band) /8k5f3e (narrow band)) programmable channels: 198 channels frequency stability: ±2.5ppm power supply requirement: 7.4v dc usable temperature range: -10°c~+60°c dimensions (projections not included/approx.): 61mm(w) x 125.5mm(h) x 36.5mm(d) inches weight: approx.280g inclusive of battery pack and antenna. projections are not included in the declared dimension values. transmitter output power: approx.10w/5w/1w modulation system: variable reactance fm spurious emissions: less than -27db max. frequency deviation: ±5khz(wide band),±2.5khz (narrow band) receiver receive system: direct conversion sensitivity (12db sinad wide/narrow): =0.2?? audio output power: 0.5w audio distortion: less than 5%