Pulsar Radio Trigger Radio Transmiter. Pulsar can trigger devices around corners and through walls. 100m Range. Pulsar allows photographers to work further distances from their light source. Long Battery Life. Expect to enjoy over 200 hours of continuos use from your Pulsar. It's a Transceiver! Pulsar can be a transmitter or receiver at the touch of a switch. Low voltage operation. Pulsar operates at just 3v perfect for use with sensitive digital cameras.