... amplifier, silver electrode, headgear, clamp, software, HP color jet pr JY-2410 characteristic: * Dual isolation, insure security * Observe and record ... echnical parameter:Voltage measurement: 25mV to 200mV, error range: ±10%.Time interval: error range is no more than ±5. ... range: +5% to -30%.Power spectrum amplitude: error range: ±10%.Power spectrum frequency: deviation range: ±5%.Noise level: ≤5µVp ...