HEK293 cells expressing hnAChR α3/β4 were characterised in terms of their pharmacological and biophysical properties using whole-cell patch clamp techniques and FLIPR calcium assay. Using whole-cell patch clamp techniques, the cells responded to increasing concentrations of acetylcholine (ACh) in a dose-dependent manner up to 1 mM, after which desensitization occurred. The mean EC50 value for the ACh-elicited current was 140 ± 6.2 µM. 100 µM methyllycaconitine (MLA) completely blocked the current elicited by 300 µM ACh. In FLIPR calcium assays the agonists epibatidine, nicotine and cytisine had EC50 values of 81.4, 9.16 and 4.16 respectively. The antagonists mecamylamine, Dihydro-b-erythroidine (DHbE) and atropine blocked the EC80 acetylcholine agonist response with IC50 values of 481, 210 and 40 respectively. Functional channel expression over time was monitored using FLIPR calcium assays. Channel expression is robust over at least 35 passages. At passage 35 the fluorescence signal window in response to 83 µM epibatidine was >16,000 RFU with a Z’ value of approximately 0.9.