Product specifications:

Whistle bare metal [without battery charger]]

Whistle head [8AH power storage]]

Whistle head [8AH lithium battery]]

Whistle head [10AH lithium battery]]

Whistle head [12AH lithium battery]]

Whistle head [14AH lithium battery]]

Whistle head [16AH lithium battery]]

Whistle head [20AH lithium battery]]

Whistle head [32AH lithium battery]]

Round head bare metal [without battery charger]]

Round Head [8AH power storage]]

Round Head [8AH lithium battery]]

Round Head [12AH lithium battery]]

Round Head [14AH lithium battery]]

Round Head [16AH lithium battery]]

Round Head [20AH lithium battery]]

Round Head [32AH lithium battery]]