Paul C. Buff CyberSync Receiver - CSRB. In great condition. Compatible with AlienBees™ and White Lightning™ flash units. Battery powered receiver for wireless firing. Requires 2 AA batteries (not included). Includes: CSRB receiver, instruction manual, box, CSSC 1/8" to 1/8" cord, CSSC-WL 1/4" to 1/8" cord, and SC-CSRAUX PC to 1/8" cord.