Fully Automatic Voice-activated, Hands-free for Both Point-of-Sale Staff and Customers. As one of the largest intercom manufacturers in the world by production output since 1997, we distribute our Drive Thru Intercom Kits in all 50 states in the US and 45 countries in the world. Based on restaurant owners' feedback and complaints, we have phased out PUSH-TO-TALK design. Now 100% of our intercoms are fully automatic VOX (voice-activated). This design feature allows the restaurant staff at point-of-sales to interact with customers completely hands-free. Welcome to the 21st century!