2 unlocking methods: the smart key box supports password unlocking/smartphone Tuya APP unlocking, which is more convenient to use. Key security: Aluminum and zinc alloy key storage boxes are and will not be forcibly opened. Small objects such as keys and cards can be stored for convenient and safe access. No need to recharge: The product requires 4 X AAA batteries, please purchase regular batteries by yourself. Convenience and practicality: No need to carry the key when traveling to avoid the risk of losing the key. Wide range of application: suitable for indoor and outdoor use. It is very suitable for decoration companies, homestay apartments, construction sites, families, communities, schools, doorways, etc.