|Battery required / not required||No|
|Continuous usable time||8 Hours|
|Manufacturer model number||WS1|
|Product size||3.56 x 1.4 x 1.4 cm; 4.54 g|
|Product weight||0.01 lbs|
Warranty and support
Returns :As a general rule, we accept returns of unopened and unused items purchased on Amazon.co.jp within 30 days after the item arrives ( excluding items that cannot be returned or exchanged ). Please check the condition of the product immediately after it arrives. Initially defective products may be accepted even after the return period has expired, depending on the content of the customer’s inquiry. Please note that the return policy differs depending on whether the item is shipped by Amazon.co.jp or by the Amazon Marketplace seller. Click here for details on returning home appliances and cameras .