... carefully. You can test the districts B, C, D, E, and F with the same way.6. After testing ... to fire A1, B1 and C1 together, please turn on the A, B, and C button and turn off others. ... If you press button “1”, and A1, B1 and C1 will fire together ... the product in the damp, acid base, alkali and contaminated environment. Accessory—One machine+2 receivers+ 70M ...