When Lyla is shooting at Harkness with a hand gun that looks like a 9mm with a clip that holds about 15 rounds. She fires at least 23 times (maybe more) without reloading.
While Cisco is communicating with the others before detonating the bomb, only Felicity seems to have a Bluetooth headset to get orders.
It was established early in The Flash's first season that if Barry speaks while moving quickly, people cannot hear him. Yet while looking for the bomb locations Barry is moving at full speed and everyone is able to hear the entire conversation. If he is moving miles in the blink of an eye, there would be no way for his coworkers to hear, let alone, understand him.