1.[Perfect accessory] This 21x30 spotting scope is easy to hold with one hand. You can connect your phone to a tripod and smartphone adapter (5.7 cm to 8 cm, compatible with most smartphones on the market). This is very convenient when watching for a long time. The scope is also equipped with a cleaning cloth, storage bag, carrying rope, and color box. 2.[21x30 Spotting Telescope] 21x30 high-power spotting telescope for adults - complete spotting telescope with 30 magnification and 21mm objective lens diameter, which can provide clear and bright images. This monoscope has a wide field of view and is suitable for outdoor adventures such as bird watching, hunting, hiking, camping, sightseeing and other activities. 3.[ Monoculars] This high-definition waterproof, anti-fog, dust-proof, shock-proof monoculars, built-in lens dust cap and O-ring sealed optical components, can prevent lens dust, moisture/debris, and ensure life waterproof function, suitable for most weather and environment (note: can not be used in heavy rain or immersed in water for a long time). 4.[BAK4 Monoculars]The 21x30 monoculars are equipped with high-power low-light prisms and multi-layer green film lenses to ensure excellent light transmittance and brightness, and the light transmittance is as high as 99.5%. Monoculars have low-light capabilities, which can help you watch things in low light (you can't see anything in a completely dark environment), providing you with an amazing viewing experience.