Professional, rugged receiver in a sturdy case. Extremely small and light! Recesses on both sides for the igniter connection wires, connection units can be easily replaced bythe user in case of damage, test mode, detachable antenna, and bi-directionalcommunication between receiver modules and transmitter.221 x 191 x 99 mm / 1.000 g / 2 x 9 V batteries and extra connection / 12-24 V