About this item Lock and Unlock: to protect your recordings, lock it: When recording is complete, turn the switch from 'R' to 'P', then press and hold the button until you hear a 'DU' sound (press and hold for 3–5 seconds);The recording will then be locked (you cannot record new messages until it is unlocked); Unlock it: when the switch is moved to 'P' again, you can remove it; Press and hold the button until you hear 'DU DU'; It is now unlocked, and you can record new messages again 40 Second Recorder: this voice recorder is a good choice for playing around and creating surprises; You can record up to 40 seconds of messages or songs for your loved ones, easy to re record new messages until you get the satisfying recording; Each heart voice recorder box is about 2.17 x 2.09 x 1.5 inches/ 5.5 x 5.3 x 3.8 cm Nice for DIY Craft Gifts: this sound recorder comes in the red heart shape, amusing and cute, ideal for your DIY craft projects, mount it in a plush toy or other toy for a one of a kind gift, to create a big surprise for your loved one or family; You will receive 8 pcs of voice recorders, sufficient to meet your needs Simple to Apply: this recordable button for stuffed animal is easy to use, just turn the switch to record mode, press and hold it while recording a message, turn the switch to play mode, press it once to play your message, simple and convenient Replaceable y: this voice recorder for stuffed animals is equipped with LR44 (AG13) ies, if the y in the recording chip runs out, you can easily replace it with a fresh one, and the recording button will continue to play the recorded message, no need to re record again