Picture
pipistrelle mini handheld bat detector / 384kHz USB microphone : APPROX £15 BUILD COST
Picture
pippyg static bat detector with 384kHz full-spectrum recording. Runs for up to 7 days powered by 3x AA rechargeable batteries, records to microSD card : APPROX £15 BUILD COST
Picture
"Griff" and "Griff Mini" 384kHz USB microphones. Use a compatible app to hear and record bats on bat walks, in the park, garden or on formal surveys. APPROX £8 BUILD COST. Can get as low as £5 if Chinese clone Picos are used.
Picture
Picture
pipistrelle for iOS - configure your pippyg for recording
Picture
Bat Detector - the PERFECT app for leading a bat walk. I wrote this so I can at least try to be helpful - but do read the manual first.
Picture
BatGizmo on Google Play store NOTE that I have *NEVER* used an Android device, I can't provide any assistance for Bat Gizmo
Picture
email me for more information. I *might* be able to provide some support for self-build devices, but it's best to assume you are on your own.