jelly Beamer Twist Transmitter: 10034200 A wireless switch featuring a 2.5-in/6.4-cm switch top that provides auditory click, visual and tactile feedback, and requires 2.5-oz/71-g of force to activate. Wireless receiver required. The Jelly Beamer Twist Transmitter is a wireless switch that brings reliable, immediate switch access without the hassle of cords. Multiple Jelly Beamers can be used in the same room at the same time, from as far away as 30-feet, without interference. The 2.5-in/6.4-cm Jelly Beamer also includes an external switch jack, allowing you to use any single switch with our wireless receivers. Jelly Beamer Twist Transmitter features: Long battery life with built-in sleep mode Unique wireless codes eliminate cross-talk between devices 30-foot range with no pointing necessary Requires the Original, SLAT, or Mini Beamer Receiver Switch tops included: Red, Yellow, Green, Blue Jelly Beamer Twist Transmitter technical specifications: Connection Type: Wireless Activation Type: Pressure Activation Surface: 2.5-in/6.4-cm diameter Activating Force: 2.5-oz/71-g Travel Before Activation: 0.015-in/0.0381-cm Feedback: Auditory click, Tactile Mounting Plate: Universal Mounting Plate