E lectronic BP Monitor 1, Cable 1, AA Batteries 4, Manual 1. CH-S603 Tunnel electronic Upper arm Blood Pressure Monitor. Pressure: 0mmHg~295mmHg(0.0kPa~39.33kPa),Pulse rate:(40~199)beats/min. Maximum allowable error : Pressure: ±3mmHg(±0.4kPa), Pulse rate: ±5%.