RS-100-L | Standard Receiver RS-120-L | Dual Head Standard Receiver RS-140-L | Quad Head Standard Receiver P-105 | Sentry Pen Mechanical Transmitter (Brushed Aluminum) P-105B Sentry Pen Mechanical Transmitter (Black Anodized) LC-110 | Dual Frequency Electronic Transmitter LC-110 AH | Dual Frequency Electronic Transmitter with Holster