Without batteries, he works like a normal
Cable release and he also has a locking function
for the bulb mode.
Obtainable with very reasonable and at every turn
AAA batteries can also use the Remote function.
The operation is self-explanatory, so you
very quickly so befriends.
The build quality is perfectly acceptable for this unbeatable price.
Conclusion: I can recommend without hesitation. Small
Round talent to spot price even cheaper and it would be paid;)