Sealey AK415 Cordless Circuit Tester Buzzer/LED

Suitable for testing DC circuits with voltages between 3 and 28V.
No earth clips to get tangled - simply contact the wire to be tested and touch your finger on bare metal ground to get a reading.
Tester illuminates LED, buzzes and vibrates on contacting live wire.
Computer-safe for use around delicate engine management systems.
Supplied fitted with 2 x long life N-sized batteries.